Grades
n. 分数；等级（grade的复数形式）
🗣️ 情景例句
Sure. We've been in business about five years now.
当然。我们创业至今有五年的历史。
How long have you had this pain?
疼痛多久了？
People change, but they don't suddenly chnge from being right-handed to being left-handed.
人会变，但他们不会从惯用右手而突然转变成左撇子的。