adder's-tongue

例句：

1. 1.The snake's tongue flicked out to warn the mouse.
   蛇的舌头猛地一吐，警告了老鼠。
2. 2. The snake's tongue was stained with blood.
   蛇的舌头上沾满了血。
3. 3. The snake's tongue flicked out to catch the mouse.
   蛇的舌头猛地一吐，抓住了老鼠。