符合的年龄对孩子们开始用手机是什么？【首先，suitable在这里是“适合”。根据你的英文，这句话的结构应该是：“适合……的年龄是几岁？”你再试一下。】

现在连八九岁的孩子们有手机【连……都……】，甚至比较年轻孩子用手机【甚至……也……】。我看了一个调查表示【显示】九岁有手机的孩子的考试成绩比较低。
对孩子们【对……来说】手机有很多缺点。在学习的时候分心。而且网络【是】很危险的地方。
虽然那么严重的缺点【问题这么严重】，但是现在很多父母买孩子手机【给someone买something】。在中学校【小学、中学、大学】为了参加社会联系【“参加……活动”。社会活动】，有手机就是不得不的【手机是必不可少的】。因此父母恐怕儿子没有朋友， 结果不是流行的学生【父母怕孩子没有朋友，成为不合群（不受欢迎）的孩子】。因为这个原因【因此】现在十二岁【的】学生平常通常【】已经有手机。
不过，在有的孩子专业心理医生看来【儿童心理医生】，实际上不是的这样的。其实，没有手机的孩子们也可以找到友谊。也许【是】更真正的朋友。
对你来说-什么年龄是符合买孩子们手机？
作文的目的是为了练习使用关于-符合

What is a suitable age for children to have a Mobile phone?
Nowadays even 8-9 year-old children have a mobile phone. Even younger children use phones. I read a report that said nine-year-olds with a phones exam marks were lower.
There are a lot of disadvantages of mobile phones for children. They can distract in school. Also there are a lot of dangers on internet.
Despite these serious problems many parents buy their children mobile phones. In order to participate in the social life of secondary schools a mobile phone is essential. Therefore parents are afraid a child without a phone won’t have friends, and the result will be that he/she isn’t a popular student. For this reason today 12 year old students already have a mobile phone.
However some child psychologists say this is not true. Really students without phones also make friends. Maybe even more real friends.
In your opinion what is the correct age to buy children a Mobile phone?

符合的年龄对孩子们来说什么年龄开始用手机是什么 适合的？

现在连八九岁的孩子们都有手机，甚至比较年轻小的孩子也在用手机。我看了一个调查表示九岁以前有手机的孩子的考试成绩比较低。
对孩子们手机有很多缺点。在学习的时候分心。而且网络上有很多危害青少年危险的地方。
虽然存在那么多严重的缺点，但是现在很多父母依然买孩子手机给孩子。在中学校为了参加社会联系，有手机就是不得不使用手机的。因此父母恐怕儿子没有朋友， 结果不是跟上/流行/潮流/的学生。因为这个原因现在十二岁学生平常已经有大量使用手机。
不过，在有的孩子的专业心理医生看来，实际上不是的这样的。其实，没有手机的孩子们也可以找到友谊。也许更能够成为真正的朋友。
对你来说-什么年龄的孩子是符适合买孩子们使用手机？
作文的目的是为了练习使用关于-符适合

What is a suitable age for children to have a Mobile phone?
Nowadays even 8-9 year-old children have a mobile phone. Even younger children use phones. I read a report that said nine-year-olds with a phones exam marks were lower.
There are a lot of disadvantages of mobile phones for children. They can distract in school. Also there are a lot of dangers on internet.
Despite these serious problems many parents buy their children mobile phones. In order to participate in the social life of secondary schools a mobile phone is essential. Therefore parents are afraid a child without a phone won’t have friends, and the result will be that he/she isn’t a popular student. For this reason today 12 year old students already have a mobile phone.
However some child psychologists say this is not true. Really students without phones also make friends. Maybe even more real friends.
In your opinion what is the correct age to buy children a Mobile phone?

（符合的年龄对孩子们开始用手机是什么？孩子应该在什么符合的年龄用手机？）
现在连八九岁的孩子们都有了手机，（甚至比他们更小的孩子也开始用手机甚至比较年轻孩子用手机。）我看过一个调查报告表示：九岁就有手机的孩子普遍考试成绩比较低。
用手机对于孩子们来说有很多坏处，比如说手机会更容易使孩子们分心，而网络中又有许多危害孩子们的信息。
虽然手机有那么严重的缺点，但是现在还是有很多父母买手机给孩子。在中学为了增加学生交流，手机就是不得不有的。因此父母恐怕孩子没有朋友， 被追求流行时尚的孩子瞧不起，而使大部分学生十二岁就有了手机。
不过，在有些专业心理医生看来，实际上并不是这样的。其实，没有手机的孩子们也可以拥有友谊，也许他更是真正的朋友。
对你来说-孩子应该应该在什么符合的年龄用手机？
作文的目的是为了练习使用关于-符合

What is a suitable age for children to have a Mobile phone?
Nowadays even 8-9 year-old children have a mobile phone. Even younger children use phones. I read a report that said nine-year-olds with a phones exam marks were lower.
There are a lot of disadvantages of mobile phones for children. They can distract in school. Also there are a lot of dangers on internet.
Despite these serious problems many parents buy their children mobile phones. In order to participate in the social life of secondary schools a mobile phone is essential. Therefore parents are afraid a child without a phone won’t have friends, and the result will be that he/she isn’t a popular student. For this reason today 12 year old students already have a mobile phone.
However some child psychologists say this is not true. Really students without phones also make friends. Maybe even more real friends.
In your opinion what is the correct age to buy children a Mobile phone?