Optical system
[计] 光学系统\\n[化] 光具组
🧩 词语组成解析
🗣️ 情景例句
There has been very little progress this term.
这学期没有什么进步。
When she leaves, he'll cry for a day.
她走时，他会哭一天。
Oh! They're all places of great interest in China. I think you'll have a good time.
噢！这些地方都是中国的名胜。我想你们会玩得很痛快的。