Focuser
聚焦放大镜, 聚焦装置
🗣️ 情景例句
Beijing Hotel.
北京饭店。
Does your computer have a modem?
你的电脑有调制解调器吗？
At that moment, everybody began to laugh and sing.
此时，大家已经笑了起来，同时唱起了歌。