广播电视英语短句 第 73 课：池塘养鱼-2

Experts say ponds with a surface area smaller than one hundred square meters may not be profitable. 专家说表面积小于100平方米的池塘没有经济效益。

But those larger than one hectare may cost too much and be difficult to manage. 但是超过1公顷的池塘开销太大而且也不容易管理。

Pond farming is one kind of aquaculture. 池塘养殖也是水产业的一种。

Other fish farms are connected to sources of free-flowing water -- a lake, river or ocean. 其他的养鱼场则跟湖，河或海这样的自由水源有关联。

This way you may not have to feed the fish. 用这种饲养方式，你也许不需要喂鱼。