Trichechiformes
海牛形亚目
🗣️ 情景例句
I hope you're enjoying your stay here.
我希望你在这里过得愉快。
I could only guess the number of people in the room.
我无法正确地猜测房间里面有多少人。
Before? After? said the doctor.
“饭前？饭后？”医生说。