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网箱养鱼,老鼠咬破网箱,跑了鱼真伤心。现介绍一种简便有效的方法:把网箱的上面四个角中的其中一角露出水面,其余三个角都浸没入水中,这样只要网箱中没有死鱼,网箱就不会被老
Cages fish, mice bite cages, ran the fish really sad. A simple and effective method is now described: one of the four corners of the cage is exposed from the water and the remaining three are immersed in water so that the cage will not be obsolete as long as there is no dead fish in the cage