Rudistids
[古生]厚殼蛤類
??? 情景例句
He jumped at the offer.
他欣然接受了這個工作機會。
Do you often study history on Saturday?
你常常在星期六學歷史嗎？
The bird covered the distance in three minutes.
這只鳥只用了3分鐘就飛完了全程。