1.Don't omit locking the door.别忘了锁门。

2.There's a knack in/to locking this door which takes a while to master.锁这门要有窍门, 得用些时间才能学会.3.The act or an instance of locking.上锁上锁的动作或上锁的一瞬时。

4. I always make a point of locking up at night. 我晚上总是注意把窗锁好。