Collimator
n. 准直仪\\n[化] 准直管; 平行光管
🏥 医学释义
准直器，平行光管
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
Please tell him to stop jumping up and down.
请告诉他不要调上跳下。
There is so much variety that you never have to make do with second best.
物品种繁多，从来不必用二等品来凑合。