- 问题详情:Swimmingcanbeaspeacefulasitisfun.Underwater,noonecantellyoutodoyourhomeworkorcleanyourythingsoundssoft,quietandpeaceful. However,totheearsofawhaleordolphin,theunderwaterworldisgettinglesspeacefulallthegesaroundthemaremakingtheoceannoisier.Forexa...
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