Humans have also inadvertently introduced more than 100 non-native and invasive species into the lakes, such as zebra and quagga mussels and sea lampreys that have decimated some indigenous fish populations.

人类也不经意间向五大湖引了100多非本土和，如斑马贻贝、石蛾和海七鳃鳗， 这些已导致某些本地鱼类数量锐减。

The quagga, though so plainly barred like a zebra over the body, is without bars on the legs; but Dr. Gray has figured one specimen with very distinct zebra-like bars on the hocks.

斑驴虽然像斑马一样明显地在身体上有条纹， 但腿上没有条纹；但是格雷博士发现了一个标本， 其飞节上有非常明显的斑马状条纹。