Opties
光学的
🗣️ 情景例句
My apologies.
我道歉。
Experience keeps no school, she teaches her pupils singly.
亲身经验，才是经验。
It is impossible to give a satisfactory explanation for a pot-holer's motives.
要想对洞穴探险者的动机作出满意的解释是不可能的。