bottom adapter

例句：

1. 1. The bottom adapter is designed to fit perfectly into the socket.
   底部适配器设计得能完美地插入插座。
2. 2. The engineer used a bottom adapter to connect the wires together.
   工程师使用底部适配器将电线连接起来。
3. 3. The bottom adapter was crucial in ensuring the device worked properly.
   底部适配器在确保设备正常工作中起着关键作用。