metacenter
n. 外心点；[流] 定倾中心
例句
As underwater depth increases, metacenter height increases, but water entry Angle decreases, so the platforms allowable swing angles also decrease.
随着吃水深度的增加，平台的稳心高变大，但平台入水角减小，所以平台的容许摆动幅度降低。
