Echelle
阶梯(分级)光栅
🗣️ 情景例句
I have perfect vision.
我的视力非常好。
You don't have to pay any duty on personal belongings.
你不必在个人财产上付任何税。
If you park your car in the wrong place, a traffic policeman will soon find it.
一旦你把汽车停错了地方，交通警很快就会发现。