Somasteroidea
体海星亚纲
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
A book that remains shut is but a block.
有书闭卷不阅读，无异是一块木头。
He is now satisfied merely to try to stand up, but as soon as he does so a porpoise knocks him flat.
此时的海龟，只要能站起来就满足了，但它刚站起来，就被一只海豚击倒。