1.水对我们的健康有必要.

　　2.我们应该保持空气新鲜阻止细菌.

　　3.如果我们不经常洗手,细菌就会通过口腔进入我们的身体.

　　4.用有足够的睡眠会使你今天保持活力.

　　1.Thewaterisnecessitytoourhealth.

　　2.Weshouldpreventthebacteriumtokeeptheairfreshly.

　　3.Ifwedonotoftenwashthehands,thebacteriumcanenterourbodythroughtheoralcavity.

　　4.Withenoughsleepbeabletomakeyoukeepthevigortoday.