Secondary(optical)axis
[化] 副轴; 副光轴
🗣️ 情景例句
My mother passed away.
我母亲去世了。
I'm afraid I can't get away from the meeting.
我恐怕难以从会议中抽身。
Excuse me. Are the hourse-drawn streetcars free?
对不起，这些马车是免费乘坐的吗？