dam
单词辨析：
主要指在河面上建起的特殊屏障，尤用来蓄水、发电等。
A huge dam has been built on the Yangtze River.
长江上建起了一个大型水坝。
The dam was not strong enough to hold the floodwaters.
水坝不够坚固，抵挡不住洪水。
主要指河流沿岸的土地或高出水面的斜坡。
The banks of the river are covered by grass.
河两岸长满了草。
Many people live along the banks of the Nile.
很多人生活在尼罗河两岸。
主要指在河面上建起的用来防洪或浇灌农田的土坝或石坝。
We have built a barrage across the river to provide water for farming.
我们在河上建造了一个水坝作农田灌溉之用。
The newly built barrage has benefited the whole village.
新建的拦河坝让整个村庄受益。
修筑于河、湖、海的某处，主要用来防止水患。
The dikes are strong enough to prevent floods.
河堤非常坚固，足以防止洪水泛滥。
指堵住通道，使人或物无法通过，语气较强。
A big stone is blocking the road.
一块大石头挡在路上。
Something blocked the flow of water through the pipe.
有什么东西堵塞了管道里的水流。
指将某处塞满东西造成堵塞；也可以指使人呼吸困难。
A pile of garbage choked the pipe.
一大坨垃圾堵塞了管道。
The gutter was choked with debris.
排水道被垃圾堵住了。
That pungent perfume almost choked me.
那刺鼻的香味差点儿让我喘不过气来。
They choked on the smoke from the chimney.
他们被烟囱冒出的烟呛得透不过气来。
指堵塞道路、孔洞等。
Every summer, there are cars clogging the road to the beautiful beach.
每年夏天都会有汽车把那条通往迷人海滩的道路堵得水泄不通。
The water pipe was clogged with debris.
水管子被废弃物堵了。
主要指阻挡住涌流物，如河水、眼泪等，常与副词 up，back 连用。
dam (up) the river
在河上建坝
It is ridiculous for him to try to dam the flow of history.
他试图阻挡历史进程的做法是荒谬的。
That poor girl dammed back her tears.
那个可怜的女孩强忍住眼泪。
指因人、车辆等过多而使某处无法通行。
The strikers jammed the streets so no car could move.
罢工者把街道堵死了，没有汽车可以通行。
Children jammed the entrance to the fair.
孩子们把游乐场的入口处挤得水泄不通。
相关例句：
The dam will stand 600 feet high
大坝将高达600英尺。
Like an iron bastion, the dam withstood the rushing floodwaters.
大坝好似铜墙铁壁，顶住了洪水的冲击。
This reservoir was formed by damming the River Blith.
这个水库是通过在布莱斯河上筑坝形成的。
It consists of shafts, culverts, channel and flood dam ( a small reservoir) composed of four parts.
它由竖井、暗渠、明渠和涝坝（一种小型蓄水池）四部分组成。
A section of the dam has caved in.
大坝出现塌方。
A dam burst and flooded their villages.
堤坝决口，淹没了他们的村庄。