①不要独自去,要与同学一起去 Don't go alone,accompanied by some students with you.②饭后、饥饿时劳累时不要去游泳 Don't go swimming after dinner or when you are hugry ③初学者要带游泳圈并注意使用 Take a lifebelt with you to go swimming if you are beginner ④水深温度低时,不要在水中停留 Don't stay in the water that is too cold. ①不要独自去,要与同学一起去 Don't go alone,accompanied by some students with you.②饭后、饥饿时劳累时不要去游泳 Don't go swimming after dinner or when you are hugry ③初学者要带游泳圈并注意使用 Take a lifebelt with you to go swimming if you are beginner ④水深温度低时,不要在水中停留 Don't stay in the water that is too cold.