胸牆的用法和樣例：
例句
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射擊踏垛排有壕溝或胸牆的平台，士兵們站在其上射擊
A platform lining a trench or parapet wall on which soldiers may stand when firing. -
炮墩，炮座堡壘內部的平台或土墩，大炮可從中越過胸牆而發射
A platform or mound of earth within a fort from which guns are fired over the parapet. -
在主要的十字路口都匆匆築起了胸牆。
Breastworks were thrown up at major intersections.
