1. It is now possible not only to locate a shoal but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
    不仅能够确定鱼群的位置，而且可以根据鱼群回声的特点分辨出是鲱鱼、鳕鱼，这是人们所熟悉的其他鱼。

2. When European explorers first came to the New World, the fishing grounds off what would become eastern Canada and New England held abundant cod and other species.
    当欧洲的探险者刚踏上新大陆时，后来成为加拿大东部和新英格兰的沿海渔场盛产鳕鱼及其他鱼类。

3. The fish are not sharks or killer whales, but favourite eating varieties like cod and skate which grow to unnatural sizes, sometimes as much as twelve feet in length.
    这些鱼并不是鲨鱼或逆戟鲸，而是深受人们喜爱的食用鱼品种，如鳕鱼和鳐鱼，只不过它们长得出奇地大，有时长达12英尺。

4. In response, Canada has closed the area to cod fishing and set strict limits on catches of other species.
    针对这一情况，加拿大关闭了这一捕鳕海域，并对其他鱼类的捕捞量也作出严格限制。