piranha
n. 水虎鱼（产于南美的一种小鱼）
复数 piranhas或piranha
例句
There are more than 60 kinds of Piranha fish.
水虎鱼有六十多种。
Most piranha species are omnivores and scavengers.
绝大多数食人鱼类是杂食和食腐动物。
Time for the ultimate killer's test: How would the piranha react to my duck?
现在是终极杀手测试时间：水虎鱼会对我的鸭子如何反应呢？
