清楚

I am extraordinarily upset, and don't know how to face my father.

我不清楚该如何去面对我的爸爸，我不清楚为何每次当我试着去原谅他的时候他总是给我致命的打击。

An individual with 20/40 vision can read letters on an eye chart from 20 feet away, while a person with normal 20/20 vision can read the chart from 40 feet away; 20/40 vision is good enough to get a driver's license in most states.

20/40的视力是可以站在20英尺外看清楚视力表上的字母，而一个视力为20/20的人则可以站在40英尺外看清楚实力标上的字母，20/40的视力是可以在美国很多州申请到驾照）。

I still remember when I was young, that attitude and behaviour caused many negative influences on "unenlightened" me. At the same time, I felicitate myself for the enlightenment and never being affected by these influences again. Moreover, I clearly understand that they have no fault and it's just a sort of style.

我清楚地记得年轻一点的时候，身边的那种"观望"的态度和行为给"尚未开化"的我造成的负面影响；而今也常常庆幸自己竟然懵懵懂懂走了过来，不再受其影响的同时，也清楚地认识到他们并没有做错什么——那只是一种行动风格而已。

Yet, the physiological restriction of the retina, that visual acuity decreases as the location moves away from the fovea, makes it necessary for the eyes to move back and forth in order to perceive information.

然而，由於视网膜神经接受细胞分布的特性，视网膜上不同区域的视觉敏锐度并不相同，在网膜的中*央小窝附近区域才能接收最清楚的影像，因此眼睛必须经常的移动，才能看清楚外在的世界。

"Why, he told you that nobody was with him a shooting when he killed the partridge;but he knows "（here he burst into a flood of tears）, yes, he knows, for he confessed it to me, that Black George the gamekeeper was there.

"哎呀，他告诉你，当他杀死那只山鹑的时候，没有人与他在射击现场；但是他心里清楚。"（说到这，他突然大哭起来），当然，他心里清楚，因为他向我坦白过，猎场看守布莱克乔治就在那里。

Then we find that any rotations around Z axis will have no effect on the vector. We say that we have a GIMBAL LOCK

这个例子，还有很多例子我都看过，都讲的不清楚，还是那个视频讲的最清楚了

Not only it impairs patients" genital health and Quality of life, but also is associated with an increased risk of type 2 diabetes, endometrial carcinoma, hyperlipemia, hyperpiesia, cardiovascular and cerebrovascular events. Up to now, precise pathogenesy of PCOS is yet unknown. The modern medicine indicates the etiopathogenisis of PCOS related to hereditism, endocrinology, immunology, metabolism and so on. The main features are hyperandrogenism and hyperinsulinemia, the correlation and between the above factors and how they inference PCOS are still unclear. In the view point of Traditional Chinese Medicine ,PCOS classifies to "menopathy","infertility" and "Zhengjia , its occurrence exists a close relationship with dysfunction of liver, kidney, spleen and further inducing deficiency, sputum, sluggish stagnant and fire. Many scholars insist that pathogenesis of PCOS is a renal deficiency plus phlegmatic hygrosis. However, after many years clinical observation.

随着研究的不断深入，PCOS日益显示出其复杂性和重要性；他不仅影响到患者的生殖健康及生存质量，而且其异常的激素环境使该类患者对子宫内膜癌、高血压、高血脂及心脑血管意外等病发生危险明显增加；但目前该病的确切发病机制尚不十分清楚，现代医学认为其病因涉及到遗传、内分泌、免疫、代谢等多个方面，以高雄激素血症与高胰岛素血症为主要特征，二者在PCOS发病中的确切作用，目前尚不清楚；PCOS相当于祖国医学的"月经病""不孕""癥瘕"等范畴，本病的发生与肝、肾、脾功能失调导致虚、痰、瘀、火有关。

Three kinds of chromosome morphology could be observed under oil immersion lens. The first type was condensed, which could be counted in total, but the band could not be seen. The second type was chromatosome that spread completely in the center of equatorial plate and were in metaphase. In this phase, total numbers and band were seen clearly. Last type-chromosomes had already folded and moved towards two poles and concentrated gradually, the total number of chromosomes could be counted, but banding could not be seen clearly.

在油镜下镜检可见3种染色体形态，一种呈高浓缩状态的染色体，可计数染色体总数，但不能显出带纹；第2种是已完全展开并铺于赤道板上的处于分裂中期的染色体，染色体总数和带纹显示都非常清楚；第3种是染色体已折转并向两极移动，并逐渐开始浓缩，染色体总数可以计数，带纹不能清楚显示。

Meanwhile, having a good knowledge of the concept of the indefinite integral and selecting and using the indefinite integral method in the right way, is the key to put the indefinite integral calculates into practice.

不少学生对不定积分的计算总是掌握不好，究其原因，一是对不定积分的基本概念不清楚，二是对如何正确使用不定积分方法不清楚。1不定积分在计算中常用的概念1原函数的定义：若F′=f，则称F为f的一个原函数。

You'd better write the words as intelligibly as possible in order to get your idea across.

要把意思表达清楚，你最好把字尽可能地写清楚。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。