Operator hierachy
[电] 算子阶组
🧩 词语组成解析
🗣️ 情景例句
Well, Grandpa will be disappointed, too.
爷爷也会感到失望。
I wonder what makes you so worried.
我不知道是什么使你这样担心。
She has been collecting stamps.
她一直收集邮票。