Let's try to measure the length between perpendiculars.

让我们试着测量垂线间距。

It is normal if two hands are in a line and perpendiculars to the floor.

标准姿势就是两只手在一条直线上与地面成直角。

For example, ancient Greek temples juxtapose tall vertical columns and wide horizontal entablatures to create rigid perpendiculars.

例如，古希腊庙宇就将高大的立柱与宽阔的横檐一并使用，以构造刚性的垂线。

Measuring hull's main dimensions: length overall(LOA. ), length between perpendiculars(LPP. ), breath molded(B. ), depth molded(D. ) and deflection before launching.

下水前测量船体主尺度：总长、两柱间长、型宽、型深、基线挠度。