Optical shutter
[计] 光闸
🧩 词语组成解析
🗣️ 情景例句
It is pleasant to jog in the early morning.
清晨慢跑很舒畅。
That work will take three hours.
完成那项工作需要三小时。
I had just lost $50 and I felt very upset.
我刚刚丢了50英镑，感到非常烦恼。