caustics signal

• 警告信号

caustics signal的用法和样例：

例句

1. Expert regard it as a warning signal of an economic smashup.
   专家们把它看作是一场经济灾难的警告信号。
2. By smacking his tail fiat on the top of the water he can also make a loud warning signal when enemies are spotted.
   当发现有敌人时，它可以靠拍击平放在水面上的尾巴来发出响亮的警告信号。