launch-latch

例句：

1. 1.The launch-latch mechanism is responsible for the safe release of the cargo.
   启动装置机制负责安全释放货物。
2. 2. The engineer had to latch the door shut before he could start the engine.
   工程师在启动引擎之前必须将门锁上。
3. 3.The latch on the door was broken, so we couldn't open it until we fixed it.
   门上的锁坏了，所以我们直到修好它才能打开。