Operator hierachy
[电] 算子阶组
🧩 词语组成解析
🗣️ 情景例句
do you need any help?
需要帮忙吗？
Care brings grey hair.
忧虑催人老。
A few days later, she sent a boy to the workman to ask him if his name was Hans Bussman.
几天后，她派了一个男孩去问那人是否叫汉斯。巴斯曼。