n.食人鱼，食人鲳，水虎鱼（能掠食活动物的南美淡水小鱼）
Piranha fish live in the lakes, and electric eels. 湖里有水虎鱼，还有电鳗。
Locals in the Amazon region often use piranha teeth to make tools and weapons. 亚马逊当地人经常用食人鱼的牙齿来做工具和武器。
