Grades
n. 分数；等级（grade的复数形式）
🗣️ 情景例句
I'm tired of working all day.
我厌倦整天工作。
Karl must concentrate on his work.
卡尔必须集中精力于自己的工作。
but they lead mysterious lives of their own as well.
但是，它们又有自己神秘的生活方式。