英语语法分析

Connect the fuel hose to the APU.

将燃油软管连接到APU上。

Aft of which is the APU access door and APU exhaust.

在它们的后面是APU检修口和APU排气口。

During the APU operation, examine the APU for leakage.

在APU运转期间，检查APU是否有渗漏。