n. 1.水闸，坝，堰。 2.坝中的水。 3.【矿物】坑道堰。 4.(牙科用的)橡皮障。 5.〔比喻〕障碍。 短语和例子 a regulating dam 拦洪坝。 a fascine dam 草坝。 a hydraulic dam 现代水闸。 a storage dam 蓄水坝。 weir dam 量水堰。 vt. 1.筑水闸堵住。 2.阻塞，遮断。 3.抑制。 短语和例子 dam up inflation 抑制通货膨胀。 dam back one's tears 忍住眼泪。 短语和例子 dam2 n. 1.母兽。 2.〔古、蔑〕母亲。
female parent of an animal especially domestic livestock
a barrier constructed to contain the flow of water or to keep out the sea 同义词：dike, dyke,
a metric unit of length equal to ten meters 同义词：decameter, dekameter, decametre, dekametre, dkm,
obstruct with, or as if with, a dam; "dam the gorges of the Yangtse River" 同义词：dam up,
A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions.
例句与用法
1.
The dam broke down and in result the land was flooded . 土地因而被淹。
2.
The water deepened after the dam was built . 堤坝建成后水已加深。
3.
Water in a reservoir is pouring over a dam . 水库中的水流过坝。
4.
The dam was in danger because of the rising flood ... 洪水猛涨，大坝告急。
5.
The water stored behind a dam has free energy . 蓄在水闸内的水具有自由能。
6.
The old aswan dam was a barrage . 老的阿斯旺坝是一个拦河闸。
7.
The dam cuts the river in the middle . 大坝把河水拦腰截断。
8.
The new dam was a bulwark against future floods . 新堤坝是抵御未来洪水的屏障。
9.
Uplift is the upward pressure under a dam . 上浮压力指的是在坝体下面向上作用的压力。
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