運動員經常運動，當他們運動完後就必須補充水分，所以水對他們來說也很重要

運動員經常運動，當他們運動完後就必須補充水分，所以水對他們來說也很重要

結果 (英文) 1:

Athletes exercise regularly, and they must replenish water after exercising, so water is also important to them

結果 (英文) 2:

Athletes often exercise and have to rehydrate when they're done, so water is also important to them.

結果 (英文) 3:

Athletes often exercise, and they have to replenish water when they finish, so water is also very important for them