The main axis of the planet's orbital ellipse shifts each time when it goes around the sun.

当行星绕太阳运行时，其轨道椭圆的主轴每次都会改变。

youdao

Unlike poll(), the pollset interface does not require the selector to copy the entire file descriptor set each time when select() is called.

与 poll() 不同，pollset 接口并不要求选择器在每次调用 select() 时复制整个文件描述符集。

youdao

I feel so happy each time when I see you on line.

每次看到你在线，我感到特开心。

youdao

b times. So I've got to go 3 b steps. All right I've got to go through the loop b times I've got three steps each time, and then when I pop out of the loop, I've got two more steps. All right I've got the initiation of answer and the return of it.

好，我一共执行了b次循环,每次循环内部进行了三次基本操作,当跳出循环后还有两个基本操作，因此这个初始的答案就是,2+3b次基本操作,来完成这个循环。

麻省理工公开课 - 计算机科学及编程导论课程节选

Therefore, it is prudent for charities to review how much each member has given over time and when each donation was made.

FORBES: Charities No Better At Investing Since Madoff

The other part of the programme kicks in at the time when each movie comes out.

ECONOMIST: Harry Potter and the publishing goldmine

These two strands of DNA peel apart from each other when the time comes for the genes all along the helix to carry out their instructions.

FORBES: Antisense and Sensibility