Somasteroidea
体海星亚纲
🗣️ 情景例句
We should have done it sooner.
我们早就该取下来的。
All is well that ends well.
结果美满都是好的。
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，