Echelle
阶梯(分级)光栅
🗣️ 情景例句
I want a package deal including airfare and hotel.
我需要一个成套服务，包括机票和住宿。
Whom will you invite to the party?
你将邀请谁参加聚会？
We can give you a little cheaper model.
我们可以提供你便宜一点的型式。