Laboratory(coordinate)system
[化] 实验室系; 实验室坐标系
🗣️ 情景例句
You won't believe it, Grandpa,
你绝不会相信， 爷爷，
Oh,don't worry about it.
哦，别担心。
'And where were you at the time?'
“那你当时在什么地方？”