Secondary(optical)axis
[化] 副轴; 副光轴
🗣️ 情景例句
You and me. Dinner.
你和我。吃晚饭。
They had to call in a heart specialist.
他不得不请一位心脏病专家。
After taking off, we were flying low over the city and slowly gaining height,
起飞之后，我们在城市上空低低地飞行，然后慢慢爬高。