swim up and down the pool是什么意思_swim up and down the pool的中文翻译

在游泳池里上下游动

swim up───向上游

up and down───上上下下; 起落；上上下下；到处；前前后后；来来往往

the pool───池塘；水池

up down up up down───向上向下向上向下

walk up and down───来回走着

peduncle up and down───花梗上下

teeming up and down───大起大落

bounce up and down───跳上跳下；上下弹跳

running up and down───连串升降

head up freestyle in the pool and see how difficult it is compared with head down swimming.───在泳池中抬头自由泳将会明白相对于头向下的游泳是多么困难。