也称为史前穴居人饮食，旧石器时代的营养饮食计划是以约250万年前的人类物种饮食为基础的：包括鱼类，动物，植物。

Also called the caveman diet, the Paleolithic diet is a nurtritional plan based on what human species ate about 2.5 million years ago: fish, animals, plants.

youdao

因为没有足够的鱼钩来诱捕，某些鱼就逃过一劫，这会导致对以往鱼类资源存量的低估，再者，在早期的延绳钓时代，许多已经勾住的鱼会落入鲨鱼的口中。

Furthermore, in the early days of longline fishing, a lot of fish were lost to sharks after they had been hooked. That is no longer a problem, because there are fewer sharks around now.

youdao

他亲历了儿童时代的河流一步步被污染，鱼类一点点的消失。

He has seen the pristine river of his childhood become polluted and fish populations disappear.

youdao