查询词典 for the first time

Compounds 1 and 2 were isolated from the genus Coleus for the first time.Compounds 3 and 4 were isolated from C.forskohlii for the first time.

化合物1和2为首次从鞘蕊花属植物中分离得到，并首次运用2D-NMR技术对其碳氢信号进行准确归属，化合物3和4为首次从毛喉鞘蕊花中分离得到。

At the same time, the first 8 focus quantities, center conditions and center integral are given for a cubic system and a computational example of cubic systems with 10 saddle quantities presented for the first time.

同时给出了一类三次系统的前8个焦点量及中心条件和中心积分，首次给出了一个具10阶细鞍点的三次系统计算实例。

Compounds 1 and 2 were new xanthones, and compound 3 was isolated as a natural product for the first time, and compounds 4 and 6 were isolated for the first time from this genus. The antioxidant activities of all compounds were evaluated by ABTS,FRAP and DPPH assays respectively. Compound 9 showed significant activity by the ABTS and FRAP assays. Compound 1 showed significant activity with IC50 value of 0.31 mg·L-1 in DPPH assay.

化合物1，2为新化合物，化合物3为新天然产物，化合物4，6为首次从该属中获得；化合物9在ABTS和FRAP模型中显示出显著的抗氧化活性；化合物1清除DPPH自由基能力的IC50为0.31 mg·L-1。

Directed against stress properties of lining structure of loess highway tunnel, the paper selects three loess highway tunnels as relying engineering according to buried depth and soil properties, and takes field observation synthetically for the first time, which pays more attention to researches on the change regulations of pressure acting on first lining and invert, axial force of lattice girder, contact stress between first and second lining, concrete strain of second lining verse the time and distributions in different positions.

针对黄土公路隧道衬砌结构受力特性，根据埋深和土质情况，选取三座黄土公路隧道为依托工程，首次开展了大规模系统的现场测试，着重研究了一衬和仰拱围岩压力、格栅拱钢筋轴力、一衬和二衬接触应力以及二衬混凝土应变时间变化规律及分布特性。

Compounds 4 and 5 are isolated from Potentilla for the first time; compouds 17 are isolated from this plant for the first time.

化合物4、5为首次从委陵菜属植物中分离得到，化合物1~7均为首次从多茎委陵菜中分离得到。

The first time I went to the M50 creative park was introduced by a "laowai" friend, as well as my first visit in Tianzi Fang; and unexceptionally, I came here with laowai again for the first time.

第一次去莫干山，是外国朋友带去的，第一次去田子坊也是和外国人一起，而第一次来这里又是被外国朋友带来的。

When you ask so many questions that your mom does not know how to answer While you sit at the front of your mom's bike When you jump into water while your dad is not watching you While you do not know how to swim and cry to ask for your dad's help When you are proud of yourself as your teacher visiting your home While most of your classmates are fear of your teacher's home visiting You are in the first decade of your life When you start to compete at school after taking your parents' suggestion As you know studying hard is the only way to change your life When you are lazy on-campus while not at home As you want to be different to your classmates When you are dreaming to move to your capital for further study As you want to get into the best school in the nation You are in the second decade of your life When you are surprised there are so many smart classmates around you After you leave your hometown and ride on your bike in the most beautiful campus When you start to treat English like your native language After you see so many schoolmates go abroad by passing English test When you are in a plane for the first time heading towards a strange land After your pass so many tests and contact so many professors You are in the third decade of your life When you surprises your peers who say why Chinese are so smart When you are out of joy after owning your first used car When your local roommate asks for a coffee after coaching you on how to drive When your advisor complains you are running too fast When you turn down one job offer and go for another When you work in the industry as a CEO-under-training You are in the third decade of your life When your customer becomes your boss When your freedom becomes your burden When your daily job is to create jobs When you nightly job is to create poems When no town becomes your hometown When no land becomes your homeland You are in the fourth decade of your life How many decades have you gone through?

十年 当你问这么多问题，你的妈妈不知道如何回答当你坐在前面的你妈妈的自行车当你跳入水中，而你爸爸不是看着你虽然你不知道如何游泳，并大声呼喊请你爸爸的帮助当你感到自豪的是自己作为你的老师您的家庭访问虽然大多数的同学都担心你的老师的家访您是在第1个十年的生活当您开始在学校的竞争后，你的父母的建议如你所知勤奋学习是唯一的方法来改变你的生活当你懒惰的校园虽然没有在家里如您想成为不同，你的同学当你梦想转移到你的资本，为进一步研究如您想进入最好的学校在全国您的第2个十年的生活当你感到惊讶有这么多聪明的你周围的同学当您离开您的家乡，你骑自行车在最美丽的校园当您开始像对待你的英语母语当您看到这么多同学出国通过英语测试当你在飞机第一次走向一个陌生的土地您传球后这么多的试验和接触这么多的教授您的第3个十年的生活当您惊喜您的同行说，谁，为什么中国如此聪明当你的喜悦当你自己你的第一个二手车当你的室友问当地的一个咖啡教练后，您就如何推动当您的顾问抱怨您正在运行速度太快当您打开了一个工作机会并转到另一个当您工作的行业作为一个首席执行官下训练您的第3个十年的生活当你的客户成为你的老板当你的自由成为你的负担当您每天的工作是创造就业机会当你每晚的工作是撰写诗歌如果没有城市成为您的故乡如果没有国家成为您的祖国您的第4个十年的生活几十年来多少，你经历？

Compounds 1-9 were obtained from this plant for the first time. Compounds 2, 5-9 were isolated from family Chloranthaceae for the first time.

化合物1～9均是首次从该植物中分离得到，化合物2，5～9为首次从该科中分离得到。

All the measurements show that the quality of our samples is excellent. 5. For the first time, the energy bowing parameters of quaternaries are verified experimentally to be non zero, and the values of that for GaInPAs, AlInPAs, AlGaPAs, AlGaInP, AlGaInAs are determined for the first time.

首次从实验上证实四元系的能带弯曲参数不为零，并且利用测量五元系化合物的光致荧光谱的方法，得到了AlGaInP、AlGaInAs、AlGaPAs、AlInPAs、GaInPAs等四元系的能带弯曲参数值。

Have been selected as statistical index, realizing for the first time the quantitative analysis of the high speed railway capacity with mixed high and medium speed train operations, and the huge amount of plannings of would be unimageable under the condition of manual drawing In the analysis four prime factors--the fleeting interval of high and medium speed trains, the matching of speed for high and medium speed trains, the number of inter-mediate stoppings and the train performance approach, have been given special analysis And a quantitative analysis has been made for the first time with regard to the impact of the variation of above four factors on the demand for the high speed train sets, and concerning conclusions have been drawn from the quantitative analysis.

其中着重分析了高中速列车追踪间隔、高中速列车速度匹配关系、中间站设置数量、组织方式等四个影响通过能力的主要因素。同时，首次定量分析了上述因素的变动与高速动车组需求数量间的关系。此外，从上述量化研究中得出了有关结论。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。