All the swimmers attending the competition wear swimming caps.
参加比赛的运动员没有人不带泳帽的。
Receptionist: and this is your swimming caps and the yellow one is for your son.
服务员：这是你们的游泳帽，这个黄色的是给您小孩的。
Receptionist: and this is your swimming caps and the yellow one is for your son. By wearing this, we can identify kids.
服务员：这是你们的游泳帽，这个黄色的是给您小孩的。这样便于我们区分小孩。
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