A platform lining a trench or parapet wall on which soldiers may stand when firing.
射击踏垛排有壕沟或胸墙的平台，士兵们站在其上射击
A platform or mound of earth within a fort from which guns are fired over the parapet.
炮墩，炮座堡垒内部的平台或土墩，大炮可从中越过胸墙而发射
The teacher told his students to catch the parapet tightly.
老师告诉他的学生紧紧抓住栏杆。
