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BACKGROUND: There are many in vitro selection method of sperm, and swim-up and density gradient centrifugation are commonly used.

摘要背景：精子体外优选方法很多，最常见的是上游法和密度梯度离心法。

It is applying similar techniques to those used by Ceres to speed up the growth of these trees and to increase their tolerance of cold.

并且采用同Ceres相似的技术来加速这些树木的生长并提高它们的耐寒能力。

The definition and stability criterion of resonant operating points in a CPT system have been described. A Poincarémapping model has been built up and its Jacobian matrix has been derived with the implicit function derivative rule and chain rule. Then the stability of the fixed points can be determined according to the eigenvalues of the the Jacobian matrix. It has been used to study an example push-pull CPT system with three resonant operating points.

文中给出了CPT系统中谐振点的定义及判断条件，建立了系统的庞加莱映射模型，并根据隐函数及复合函数求导法则，推导出了系统庞加莱映射周期不动点的雅可比矩阵，根据雅可比矩阵的特征值分布情况，即可判断各不动点的自治振荡稳定性。

He said that the financing of the funds after the China Publishing Group will be used to invest in four areas: First, further development of the main business, expanding professional publishing, teaching materials and publications, children's publishing; the second is to speed up publication of digital development and search for new profit growth point, construction new digital publishing industry chain and promote the transformation of the overall situation of the publishing industry in crisis, the completion of metamorphosis; third is to increase the pace of overseas development, and actively participate in international market competition; 4 is to build creative cultural industry park.

他表示，融资后中国出版集团的资金投向将用于四个领域：一是进一步发展主业，拓展专业出版、教材出版、少儿出版；二是加快出版数字化开发，寻找新的利润增长点，建构新的数字出版产业链，推进出版产业整体格局的转化，在危机中完成蜕变；三是加大海外发展步伐，积极参加国际市场竞争；四是建设文化产业创意园。

The commonest terms used in electricity today are Franklin's words: battery, brush, armature, chare, condense, conductor, plus, minus, positive, negative —— terms he made up as he made observations or conducted experiments.

如今电力方面最常用的术语是出于富兰克林的，例如：电池、电刷、电池、电刷、电枢、、电容、导体、正电、负电、阳极和阴极等。他创造这些属于就如同他观察或进行试验一样。

The Forrests used to live on the waterfront in Chatham and Gary would go outside every day and look up and down the river.

弗瑞斯特一家住在Chatham的一个河边，加里每天都喜欢到河边走来走去。

In order to secure the workers at height, the cherry picker is used for picking up workers from ground to testing the installed steel members.

为了保证高空作业的工人，利用升降机将工人从地面载起进行已经安装的构件的检查工作。

If I had used this chewing gum when I was giving up smoking ten years ago

如果我十年前戒烟的时候就吃这种口香糖的话

The purpose of this study, on the base of former research, was to reveal and better understand some molecular pathogenesis of AE, to set up a working model which could be generally used by anther researcher in the field of animal molecular pathology. One-day-old SPF chicklings were inoculated via intracephalic injection at a dose of 0.03ml per chickling, consisting of 1:100 tissuer virus suspension.

本研究用AEV-NH937株组织毒1：100倍稀释，0.03ml/只脑内接种1日龄SPF雏鸡，分别在攻毒后1、3、5、10、14、20、25和30天迫杀实验攻毒组4只，对照观察组2只，分离血清，制备外周血、胸腺、法氏囊和脾脏的淋巴细胞悬液，同时采集脑组织，10%福尔马林固定，制备石蜡切片，做H.E。

You should be trying to make it as easy as you can for them to do what I used to do – and I bet you did too – to make up for taking time off when a childminder has a cold by getting the work done from home at midnight if need be.

你应该尝试尽可能地让她们容易采取我曾经采取的做法——我相信你也曾这样做过：如果需要的话，让她们夜里在家里完成工作，以补偿因保姆感冒而请的假。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。