Now, it's in this active site that aspirin and ibuprofen do their work.

阿司匹林和布洛芬，就是在这个活性部位发挥作用。

The active sites of COX-1 and COX-2 fit arachidonic acid very cozily.

COX-1和COX-2的活性部位非常适合花生油酸。

Now, all enzymes have an active site. That's the place in the enzyme where the reaction happens.

所有的酵素有特定的活性部位，也就是酵素反应发生的地方。

Ibuprofen, on the other hand, enters the active site, but doesn't break apart or change the enzyme.

另一方面，布洛芬进入活性部位，但不破坏或改变酵素。

But it is a job someone still has. About 150 active missile sites remain in North Dakota, although Jaeger says few know about them.

但这仍然是人们需要完成的使命。虽然雅戈尔表示鲜有人知，但在北达科他仍然有大约150枚主动制导导弹。

That move would make Fordow an active atomic site, rather than the research facility Iran agreed it would be as part of the accord with world powers.

此举将让佛岛成为活跃的原子场所，而不是伊朗和世界大国协定的研究工厂。