底部的的用法和樣例：
例句
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底內動(dòng)物生活在水體底部的水生動(dòng)物，尤指棲于松軟海底的水生動(dòng)物
Aquatic animals that live in the substrate of a body of water, especially in a soft sea bottom. -
字幕電映放映時(shí)疊映在畫(huà)面底部的翻譯過(guò)來(lái)的對話(huà)的書(shū)面形式；字幕
A written piece of translated dialogue superimposed at the bottom of the frame during a film; a subtitle. -
沉渣沉到液體底部的東西；沉積物
Something that settles to the bottom of a fluid; sediment.
