请确保门闩锁好，以防风把门吹开。

Make sure the ___latch is secure to prevent the wind from blowing the door open.

请记得出门前把门闩好。

Please remember to ___latch the door before leaving.

老师解释了三次，她才终于理解了这个概念。

The teacher explained three times before she finally ___latched onto the idea.