sink
单词辨析：
通常指房屋等倒塌，强调突然性。
The roof collapsed under the weight of snow.
房顶在雪的重压下突然坍塌了。
A lot of tall buildings collapsed in the earthquake.
许多高楼在地震中倒塌了。
尤指由石头或岩石构成的建筑物或土地崩塌或崩裂。
Many houses crumbled into cinders.
许多房子坍塌，成了废墟。
The old stone wall began to crumble.
那座旧石墙开始崩塌。
The cliff has gradually crumbled away.
峭壁已经逐渐坍塌。
通常指因失去平衡等而倒塌或跌倒。
Many trees fell in the storm.
在那场暴风雨中，许多树都被刮倒了。
The falling wall showered dust on them.
倒塌的墙壁弄了他们一身土。
I fell and hurt my knee.
我跌了一跤，摔伤了膝盖。
尤指人因过于劳累、体弱等而倒下或坐下。
She sank to the floor without the support of his shoulder.
少了他肩膀的支撑，她倒在地板上。
He was stunned and sank to the ground.
他被击昏，倒在地上。
She sank into a chair, exhausted.
她筋疲力尽地倒在椅子里。
相关例句：
He sank two crucial putts in the last three holes.
他在最后的三洞中完成了两个非常关键的击球入洞。
Her voice sank, and he moved closer to catch what she was saying
她的声音变小了，他走近了些想听清楚她在说什么。
The government doesn't want to force inefficient firms to sink or swim too quickly
政府并不想迫使效率低的公司过快地自生自灭。
In a naval battle your aim is to sink the enemy's ship
在海战中目标就是击沉敌船。
My heart sank because I thought he was going to dump me for another girl
我的心情一下子很沮丧，以为他要为了另一个女孩和我分手。
She'd sometimes sink into depression
她有时会陷入忧郁之中。