Collimators
n. 准直仪; 描准仪
🗣️ 情景例句
Where does it go?
放在哪儿？
Fall sick and you will see who is your friend and who is not.
困难见友情。
I'd like to have my boss go through the plant some day.
我真想叫我老板哪天也过来看看。