Trichechiformes
海牛形亚目
🗣️ 情景例句
Have you got any plans for celebrating your birthday?
你计划好怎样庆祝你的生日了吗？
His presence in the room was not noticed.
没有人注意到他在房间里。
Children who play truant from school are unimaginative.
逃学的孩子们都缺乏想像力。