Somasteroidea
体海星亚纲
🗣️ 情景例句
Oh, that's wonderful! That's wonderful!
噢， 真是美极了 ，真是美极了！
Courtesy costs nothing.
谦虚恭敬，不用分文。
it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,
因此完全有理由把海床看作地壳的基本模壳，