离

In this paper,a portfolio choice model is proposed based on mean absolute deviation.

用绝对离差刻画了风险，提出基于绝对离差的证券组合投资模型，并用模拟退火算法求解。

As walk-off angle and acceptance angle of beam limit the conversion efficiency and the tunable wavelength range of difference frequency generation, research include effective nonlinear coefficient, walk-off angle and acceptance angle as functions of wavelength, the relationship between conversion efficiency and acceptance angle, and the impact of crystals length on the process of frequency conversion.

由于光束的走离角、允许角限制了转换效率和差频调谐波长范围，研究内容还涉及了有效非线性系数、走离角和允许角与波长的关系，转换效率与允许角的关系，以及晶体长度在频率变换过程中产生的影响。

Liberty is to faction what air is to fire, an aliment without which it instantly expires.

自由对于党争来说就象空气对于火一样，都是一种必不可少的养料，火离了空气就会熄灭，党争离了自由也会终止。

A unobstructed four-mirror anastigmat system was proposed, which was modified based on three-mirror anastigmat and had compacter structure.

介绍了一种无中心遮拦的离轴四反射镜系统，由离轴三反系统改进而成，结构更加紧凑。

Intermediate image of three-mirror anastigmat having two image surfaces was between secondary and tertiary mirror. In order to fold the optical path, four-mirror anastigmat was designed by adding the spherical reflective mirror at intermediate image.

带一次中间像面的离轴三反系统的中间像位于次镜和三镜之间，为了进一步折叠光路，在中间像面处加入球面反射场镜，从而成为离轴四反。

If this is the pressure between the two is too big or anisotropism, you should adjust the pressure between the two; if it is a blanket of backing make UN-uniform, then it should be resurfacing.

如果是二者之间的不张力功不小或不不平衡，不离答调度两者的不张力；如果是橡皮布的衬垫物铺得不平均，那么不离答轻陈铺匀。

Diels (contains ligustilide ＞ 70%), could markedly inhibit the contractile function of isolated uterine smooth muscle of mice in a concentration-dependent manner (the utlimate bath concentration is 1 mg/100 mL～32 mg/100 mL) whether the test sample was isolated from normal or oxytocin treated mice. It proved that angelica oil had significant anticonvulsive effect in uterine smooth muscle of mice.

当归油 (含藁本内酯 ligustilide＞70%)，用1%吐温-80助溶，无论对正常未孕离体子宫还是对经缩宫素处理的离体子宫，都可剂量依赖性(浴槽终浓度为 1 mg/100 mL～32 mg/100 mL)地抑制子宫平滑肌的收缩功能，其性质与妇痛宁滴丸相似，但作用稍强，表明其有抗子宫平滑肌痉挛作用。

The effects, of protection and treatment with, combined Ch, NaF and a trophie were significantly better than that with atropine alone. In isolated phrenic nerve-diaphragm preparation of rat, isolated jejuneal preparation of, guinea pig, and the metabolic experiment of rat liver, the results of the, assay on the rat blood ChE activity indicated that antidotal effect of NaF may be due to the antidese...

大鼠离体膈神经膈肌、豚鼠离体空肠和大鼠肝脏代谢实验及对大鼠全血胆碱酯酶活力测定的结果表明，NaF的抗毒作用可能是由于其对神经肌肉接头和/或神经节中的N受体的抗脱敏作用；而Ch则可能通过其对ChE的保护和/或加速被抑制ChE的复能，阻碍Ach到达M受体部位而发挥作用。

Astronomers call this point aphelion, and, at aphelion we're about three million miles farther from the sun than we will be six months from now.

天文学家称这个点为远日点，在远日点，我们在离现在6个月后离太阳的距离大概有300万米。

I remember that when I was in the countryside,my family had an apple tree,far away from my home but very close to another family.It was very difficult for us to protect this apple tree.

记得我在农村的时候，我们家有一棵苹果树，这棵苹果树离我们家比较远，离另一家人比较近，我们很难保护这棵苹果树。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。