Dendroidea
树形笔石目
🗣️ 情景例句
Are you sure about that?
你真的这么想吗？
He has never been out of China, so he is very excited about liveing abroad.
他以前从未出过国，因此对出国很兴奋。
no more than one or twofeet thick.
气垫只有一两英尺厚。