他有一把用来从马蹄上取石头的带钉小刀，我帮他刻上了我名字的首字母。

He had a penknife with a spike for getting stones from a horse's hoof, and I helped him to carve my initials.

youdao

我想从我的帐户上取五百美元。

I want to withdraw five hundred US dollars from my account.

youdao

小姑娘去壁炉边椅子上取披肩，这时，她舅舅拿着个灯笼从后面进来。

As the little girl went to the chair by the fireplace to retrieve her wrap, her uncle came in from the back with a lantern.

youdao

And what if I took a unit charge and I multiplied it times unit voltage, one volt?

如果我取个元负荷,让它乘上个电压单位，一伏特？

麻省理工公开课 - 固态化学导论课程节选

So, basically what we're saying is if we take any shell that's at some distance away from the nucleus, we can think about what the probability is of finding an electron at that radius, and that's the definition we gave to the radial probability distribution.

本质上我们说的就是,如果我们在距离原子核,某处取一个壳层，我们可以考虑在这个半径处,发现电子的概率，这就是我们给出的,径向概率密度的定义。

麻省理工公开课 - 化学原理课程节选

If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.

如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上

耶鲁公开课 - 基础物理课程节选