Premium grades
[化] 优等品
🧩 词语组成解析
n. 分数；等级（grade的复数形式）
🗣️ 情景例句
Anything to drink?
要喝点什么吗？
This is a rather old house. It needs painting.
这房子挺旧的，得刷一下才行。
It's hard to say.
难说。