Conodont
n. [古生]牙形刺, 牙形石
🗣️ 情景例句
You did the best you could.
你已经尽力而为了。
A friend is never known till a man have need.
不到患难时，永远不能认识真正的朋友。
At the far end of the lake, they came to huge piles of rubble which had been washed up by the water.
在湖的尽头，他们见到一大堆一大堆由湖水冲刷上岸的碎石。