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The general condition for athermalizing an optical system when the object surface is at finite or infinite distance is deduced in this paper, and the principle and design method of employing a diffractive optical element to athermalize and achromatize an optical system with normalized T-C chart are expanded.

推导了物面位于有限远和无限远时，实现热补偿的通用条件；并阐述了利用归化T-C 图设计消热差和消色差的红外光学系统的原理和方法。

The general condition for athermalzing an optical system when the object surface is at finite or infinite distance is deduced in this paper, and the principle and design method of employing a diffractive optical element to athermalize and achromatize an optical system with normalized T-C chart are expounded.

本文推导了物面位于有限和无限距离时实现光学补偿的通用条件，论述了利用归化T-C图设计热补偿和消色差红外光学系统的原理和设计方法，给出了8-12μm波段内、焦距123mm、相对口径F/2.5在20-60℃温度范围内的折衍混合红外光学系统的设计结果和理论评价结果，所述的设计方法可方便地推广到前视红外系统中。

The 22-year-old Spaniard, who moved to Totnes in south Devon in 2003, was born with achromatopsia, a rare condition that affects only one person in 33,000 and causes monochromatism, or complete colour blindness.

这部机器的发明者是一位年仅23岁的数字多媒体专家亚当·蒙塔丹。他表示，他的这项发明就好像是"在倾听一个色彩之轮"。

The experiment indicates: on condition that the mole ratio is 1.1:1, temperature is 90~98℃, pH is 1~2, acid adding speed is 1 drop/(2~3) second, the yield and quality of the products can get increased when reaction liquid disposed with ultrasound wave.

实验表明：在硅酸钠与钨酸钠的物质的量比为1.1：1，控温90~98℃，pH值1~2，加酸速率1滴／(2~3)s的优化条件下，用超声波处理反应液可以增加产品的产量和质量。

Decided relatively the craft condition of beautiful: IA occupies total monomer rub Er mark is 22%, 6.67% what cross ammonium sulphate dosage to be total monomer quality, reaction temperature ℃ of 80 ℃~85, acrylic acid and the drop that cross ammonium sulphate add time to be 2.5 H, heat preservation time is 3.5 H, total reaction time is 6 H.

确定了较佳的工艺条件：IA占总单体的摩尔分数为22%，过硫酸铵用量为总单体质量的6.67%，反应温度80℃~85℃，丙烯酸和过硫酸铵的滴加时间为2.5 h，保温时间为3.5 h，总反应时间为6 h。

Test research on the concrete resistance to chemical attack was conducted under different salt and acid attack condition.

对普通混凝土在各种盐类、酸类侵蚀介质作用下的抗化学侵蚀性进行了试验研究，测定了混凝土的侵蚀破坏率和混凝土中的氯离子含量。

Under the condition of natural acid deposition, the soil will be acidified gradually.

摘 要：自然酸沉降环境下，土壤酸化是一个逐步累积的过程。

Below condition of socialist market economy, most leader cadre underwent an acid test, it is it is better to be mixed well.

在社会主义市场经济条件下，大多数领导干部经受住了严峻的考验，是好的和比较好的。

It was showed, the acid value and the peroxide value increased with heating time in normal condition.

结果表明，在常压条件下，随加热时间加长，酸价和过氧化值呈线性增大。

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

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。