也就是说

After the Nazis came to power in Germany, many scientists emigrated (that is, left Germany).

纳粹夺取了德国的政权之后，许多科学家都迁走了（就是说，离开了德国）。

That's how the phrase memento mori should be read: don't forget to die!

就是说“mementomori”这个拉丁短语应该被读：谨记死亡！

She was born a dipygus, meaning that she had two separate pelvises side by side from the waist down.

她生出来的时候就是双臀畸形,就是说她腰部下来两边分别有一个独立的。

That is, he might be able to prevent, or “estop,” you from using that argument as a defense, because of his reliance on your actions.

就是说，他许能“禁止（你）供”，或防止你利用这场争防卫，由于他对你行的依赖。

Britain has promised Rwanda $100m in aid a year over the next decade, with only “light conditionality” (in essence, an understanding Rwanda will not reinvade Congo).

英国承诺卢旺达在今后的10年内，每年会向他们提供1亿美元的援助，但附带“轻微的制约性”（就是说，就卢旺达不回再次侵犯刚果而达成共识）。

Aren't all membranes semi-permeable? That is, the whole point of a membrane is that it lets some things through and others not. Membranes by definition are permselective or semi-permeable barriers.

就是说他认所有的膜都是半透的，从定义来看就是选择透过或者半透结构。

First, the solid ice on the surface could have been annealed, meaning that its temperature could have been raised above the 78 Kelvin mark to allow the amorphous ice to recrystallize.

首先，表面的固体冰曾经退火过，就是说其温度曾升高至78K以上使无定型冰重新结晶。