The irony is just occurring to me.

我也是刚意识到这件事有多讽刺。

Here is where the vital exchange occurs.

这就是关键的交换之地。

That is when the greatest progress occurs.

这是最伟大的进步来的时刻。

Q7. What will happen when the climate catastrophe occurs?

7。 气候灾难降临的时候会发生什么？

Most influenza deaths occur in developing countries and very few vaccinations occur there.

大多数流感死亡发生在发展中国家，但那里的居民很少种疫苗。

A rescue team was on a training mission nearby when that accident occurred.

事故发生时，一组队在受训练。

Let us examine some of the ways in which this is occurring.

让我们来分析一下这些在发生的变化。

Scientists stationed in Antarctica noticed a massive drop in overhead ozone occurring every spring.

驻扎在南极洲的科学家注意到了每年春天上空臭氧的大幅下降。

Thus avoiding accidents that otherwise might have occurred.

从而避免可能会发生的事故。

We also refine naturally occurring radioactive ores to fuel nuclear power plants.

我们也提纯自然出现的放射性矿石来为核能工厂提供燃料。

Osteosarcomas often form in the metaphysis where there's a lot of cell division occurring.

骨肉瘤常形成于干骺端，表现为大量细胞分裂。

Without control, human civilization would probably never have occured.

没有控制，人类文明可能永远不会发生。

The wonder would have been if it had not occurred.

倘若没发生的话，那倒奇怪了。

So the fact that five of them occurred last year is significant.

因此，去年发生了五起这样的事件，这一事实意义重大。

But some naturally occurring compounds have been restricted, too.

但是一些天然化合物也受到限制。

The terrible car accident occurred last Friday.

可怕的车祸发生在上星期五.

I didn't not tell you. It just didn't occur.

我不是不想告诉你 只是没想起来。

And it's in this moment of delay that deja vu occurs.

而这个时候就会产生所谓的“既视感”。

There's so much material that a traffic jam occurs.

物质太多，都发生拥堵了。

The U.S. most recently found that genocide occurred in Darfur.

美国最发现达尔富尔地区出现了种族灭绝。