Ophiacodonta
蛇齒亞目
??? 情景例句
If you are going to insist, then just do it.
如果你想堅持，那么就堅持到底。
That's very nice of you, but I really can't.
謝謝你的好意，但是我實在不能再呆了。
What clothes did they wear?
他們穿什么？