The internet is colorful, wonderful and joyful, but there are some rubbishes, dirts and traps too.They are very harmful to both body and mind health of the youths.

• 网上很丰富，网上很精彩，网上很热闹，但网上有垃圾，网上有污物，网上有陷阱，这些对青少年身心健康造成不小伤害。