在某一时刻

We need pitching to keep the game where one base- hit here or there mean something.

我们需要投手把比赛控制在某时刻的一支安打都意义著什麼。

For a long time, it is believed that security price reflects information completely, future price is unpredictable, and no investor can earn premium returns basing on the information.

学术界在很长的一段时间里都认为市场是有效的，证券价格总是能充分体现可获信息变化的影响，未来的价格是不可预测的，任何投资者都不能在某时刻依据已有的信息来获得超额回报。

After we get the TPD function of a little time interval, substitute it and the initial probability distribution into the Chapman-Kolmogorov equation, we can get the full time path of the development of system's probability distribution function .

在求得了某一段时间间隔内的转移密度函数后，将其和系统的初始概率分布代入Chapman-Kolmogorov方程就可以求得各时刻系统的概率分布。

This paper will assume that there are effective stock market and effective executive market, and the basic hypothesises in Black-Scholes Stock Options Pricing Model are correct. We will discuss the optimal repricing scheme under three situations, one is that the board of the company considers repricing when the price declines straightly ; the second is at the beginning of stock life,the board promises to reprice under some conditions at a certain coming time; the third is when some condition happens at an uncertain coming time, the board promises to reprice the ESO.

本文在有有效的股票市场，也有有效的经理人市场，Black-Scholes期权定价模型中的基本假设是正确的条件下，分别讨论了公司的董事会在股价持续下跌时考虑重新定价、在授予经理人期权的时候就承诺在未来某一确定时刻一定条件下可以进行重新定价和未来不确定时刻一定条件下可以进行重新定价三种情况下的最优重新定价问题。

At initial time the core is saturated by oil or water,and put the core into a sample holder with two pressure transducers at ends;Then make the core in a high pressure condition and shut-in the ends of holder;After the pressure of core is steady,open one end of holder to one certain pressure,in the same time, measure the pressurd of sealed end,until attain to another balance state.

设计实验方法为：初始时刻，将岩心在高压下饱和原油，在一端封闭，并装入测压计，待系统压力平衡且稳定后，将岩心另一端放空至某一压力值，连续测量封闭端压力变化，直至系统达到稳定状态。

All the love stories have something in common. Once upon a time, I have

所有的爱情故事都有相同之处，在我生命的某一时刻我也经历过这些，然而我已

All the love stories have something in common. Once upon a time, I have thatexperience too.

所有的爱情故事都有相同之处，在我生命的某一时刻我也经历过这些，然而我已记不得这些。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。