Nowadays，mobile phones are very They are playing an important role in our We can use them to read news，send messages，make phone calls and read all kinds of Besides，we can use them to enjoy music，do some shopping and play In a word，mobile phones have made our life more

However，they also bring us many For example，if people use them while riding，they may have traffic If we spend a lot of time on the mobile phones，it may affect our What's more，they're bad for our eyes and

In my opinion，we shouldn't spend lots of time on them and we should use them