1、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。
2、abandon
离弃；遗弃；抛弃
He claimed that his parents had abandoned him.
他声称父母遗弃了他。
The road is strewn with abandoned vehicles.
道路上满是弃置的车辆。
中途放弃，中止（活动、工作等）
The authorities have abandoned any attempt to distribute food.
当局中止了分发食物的尝试。
The scheme's investors, fearful of bankruptcy, decided to abandon the project.
因为担心破产，该计划的投资者决定放弃这个项目。
放任；放纵
He has spent money with gay abandon.
他肆意挥霍钱财。
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。