Underclassification
降低货物等级
🗣️ 情景例句
Well,
是的，
I know the boy whose father is a dentist.
我知道那个男孩的父亲是牙医。
but by now the Thermopylae was over five hundred miles ahead.
但此时，“赛姆皮雷”号早已在500多英里之遥了。