英语语法分析

A new helicopter arrives unassembled and in boxes.

一辆新的直升机是拆装放在盒子里运来的。

Hold the plastic part when assemble and unassembled.

装卸时应手握塑料件部分。

Sailboats, assembled or unassembled, with or without auxiliary motor.

帆船，已装配或未装配者，有无辅助发动机均在内。