1、Which coincide with the mean sea level surface is the geoid.
其中與平均海平面重合的面就是大地水準面。

2、Placing the roof assembly on a level surface can damage the roof assembly frame.
將天窗總成放置在水平面上可能導致天窗總成框架受損。

3、The car should be on a level surface with the parking brake on and engine off.
將汽車停放在水平的地面上，關閉發(fā)動機并拉緊手剎。

level surface翻譯