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
Have you ever been to Far East Department Store?
你曾去过远东百货公司吗？
A wise man changes his mind, a fool never will.
智者通权达变，愚者刚愎自用。
On which ones?
哪几个品目呢，