1、discover

发现(以前不知道的事实)

She discovered that they'd escaped.

她发现他们已经逃跑了。

I discovered I was pregnant.

我发现自己怀孕了。

(第一个)发现

the first European to discover America.

第一个发现美洲大陆的欧洲人

In the 19th century, gold was discovered in California.

19 世纪时，在加利福尼亚发现了金子。

初次接触(某活动并乐在其中)

I wish I'd discovered photography when I was younger.

我要是早点接触到摄影技术就好了。

Discover the delights and luxury of a private yacht.

体验私人游艇的乐趣和奢华。

2、collapse

倒塌;塌下

A section of the Bay Bridge had collapsed.

海湾大桥有一段垮塌了。

The roof collapsed in a roar of rock and rubble.

屋顶轰隆一声塌了下来，碎石瓦砾落了一地。

(体系或机构)崩溃，瓦解，突然失败

His business empire collapsed under a massive burden of debt.

他的商业帝国无力承担沉重的债务负担而垮掉了。

This system has collapsed in most countries where it ruled.

这一体系在其占统治地位的大多数国家都失败了。

(因生病或虚弱)突然倒下，昏倒

He collapsed following a vigorous exercise session at his home.

在家剧烈运动了一阵后他突然昏倒了。

It's commonplace to see people collapsing from hunger in the streets.

在街上看见有人饿晕是很平常的事。