gated latch

例句：

1. 1. The security latch on the door is easy to operate.
   这扇门的安全锁扣很容易操作。
2. 2. The old house had a wooden door latch that was worn out.
   那所老房子有一个木制的锁扣，已经磨损了。
3. 3. The new security system includes a digital latch for added security.
   新的安全系统包括一个数字锁扣，以增加安全性。