查询词典 difficult point

It is difficult Boost converter has good dynamic adjustment performance and stability if the system using a single voltage feedback loop get some interference. The reason is Boost converter has a zero point in right half plane.

Boost变换器的开环传递函数有一个位于右半平面的零点，使得使用单一的反馈电压环难以同时保证系统在受到某种扰动作用时，既有很好的动态品质又不致造成系统失稳。

There is so little uniformity that it is difficult to generalize further than to point out three salient characteristics that relate to the ranks from which judges are drawn, to the method of their selection, and to their tenure.

由于一致性太少，因此除了指出关于选任法官的等级、遴选方法及其任期的三个明显特点之外，很难再作进一步的概括。

Elementary school mathematics teacher on all "Understanding Time" this class, this is the traditional content, is also the student in the elementary school low year section key point and the difficult content.

小学数学教师无一不上过《认识时间》这节课，这是个传统内容，也是学生在小学低年段的重点和难点内容。

From his dead and the winning of the treasure, we may deep analyze his viw point of marriage rationally. It's not difficult to find self-abasement in him which deprived his marriage of surface glory.

从他的死与财的神奇的获得来以理性角度深入分析其婚姻观，不难发现其婚姻观中存在的瑕疵——自卑心理，这无疑使他的婚姻观失去了表面的光彩。

Setscrew Type: Two setscrews have a angle of 90 °,this low-cost type features the most conventional attachment.However,the point of setscrew may cause damage to the shaft and may be difficult to remove.

定位螺丝固定：两个定位螺丝间隙 90 °对所固定的轴进行锁紧，是一种传统的固定方式，由于螺丝的前端与轴心接触，可能会造成轴新的损伤或拆卸困难。

Louganis had to make a near perfect dive to take the gold and he did it with the most difficult one in his repertoire, a 1-1/2 somersault in tuck position, allowing him to edge Xiong Ni by a mere point to win the gold.

他最后做出了其拿手好戏中最难的动作：一个抱膝1周半空翻，就这样仅以0.1分的优势从熊倪那儿夺走金牌。

Louganis had to make a near perfect dive to take the gold and he did it with the most difficult one in his repertoire, a 1-1/2 somersault in tuck up position, allowing him to edge Xiong Ni by a mere point to win the gold.

洛加尼斯必须完成一个近乎满分的动作才能获得金牌，而他真的做到了这一点。他最后做出了其拿手好戏中最难的动作：一个抱膝1周半空翻，就这样仅以0.1分的优势从熊倪那儿夺走金牌。

To detect a moving point target that is submerged in noisy background is a very difficult problem.

要把淹没在噪声背景中的运动点目标检测出来是一个十分困难的问题。

With the development of the technology in science, the common materials are very difficult to satisfy numerous needs. Being known for the most prospect material of 21 century, the nanomaterial with its superior function and the extensive usage has become the investigative point in science in new material.

随着科学技术的发展，普通材料很难再满足众多的需求，被誉为21世纪最有前途的材料——纳米材料以其优越的性能、广泛的应用前景已成为新材料科学研究的重点。

Insist on , it comes down to be very difficult really, Lu Xun Mr. appreciate though it is the last one that can insist on , go to people of terminal point very much.

坚持下来真的是很不容易的，鲁迅先生非常赞赏虽然是最后一个但仍能坚持跑到终点的人。

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。