Optical system
[计] 光学系统\\n[化] 光具组
🧩 词语组成解析
🗣️ 情景例句
That's music to my ears.
正合我意。
He is attending a conference now.
他正在出席会议。
In this way, we have learned all that we know of the laws of astronomy,
例如，用这种方法，我们完全掌握了天文学的规律。