Sirenia
海牛目
??? 情景例句
How are you?
你好嗎？
I'm going to show him how to write.
我正要指點他如何寫字。
One authority on spiders made a census of the spiders in grass field in the south of England,
一位研究蜘蛛的權威對英國南部一塊草坪上的蜘蛛作了一次調查。