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渔民捕鱼很辛苦,一出海就是几周的时间,还要面对危险的海浪。未来,捕鱼季节来临了,人们用超声波把养殖在大海里的鱼吸引到海底
Fishermen fishing very hard, a sea is a few weeks time, but also face the dangerous waves. In the future, the fishing season is approaching, and people use ultrasound to bring the fish that is being raised in the ocean to the bottom of the sea