很多蜉蝣种拙游泳充其量结合，剥其外层若虫皮肤他们等候治疗退化成为鳟。

Many mayfly species are clumsy swimmers at best, and combine that with shucking their outer nymph skin, they become a flailing treat for the waiting trout.

youdao

很多蜉蝣种拙游泳充其量结合，剥其外层若虫皮肤他们等候治疗退化成为鳟。

Many mayfly species are clumsy swimmers at best, and combine that with shucking their outer nymph skin, they become a flailing treat for the waiting trout.

youdao