Lean against the lift wall closely with your back and head becomes one straight line.

第三、整个背部跟头部紧贴电梯内墙，呈一直线。

youdao

Lean against the lift wall closely with your back and head becomes one straight line.

第三、整个背部跟头部紧贴电梯内墙，呈一直线。

youdao