Underreamer
扩孔器
🗣️ 情景例句
You are very lucky, Robbie, to have such a nice family.
Robbie你真幸运 拥有这样温馨的家。
Who has never tasted bitter, knows not what is sweet.
不尝黄连苦，怎知蜂蜜甜。
My daughter, Jane, never dreamed of receiving a letter from a girl of her own age in Holland.
我的女儿简从未想过会接到荷兰一位同龄姑娘的来信。