Conjunctivas
结膜
🗣️ 情景例句
I really feel bad about it,
我真过意不去。
It's not fun for me.
我觉得一点意思也没有。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。