children的单数形式是child。child作为名词，中文含义有“儿童”、“小孩”、“儿子”、“女儿”、“深受…影响的人”。children是一个不规则的复数名词，中文翻译为“孩子们”。

children中文翻译为孩子们，是child的复数形式。例句有：

1、The two groups of children have quite different characteristics.

这两组儿童具有截然不同的特点。

2、It's only human to want the best for your children.

为自己的孩子谋求最好的条件是人之常情。

3、Many children can't function effectively in large classes.

许多孩子在大班上课时学习效果不好。

4、Children usually transfer to secondary school at 11 or 12.

儿童通常在11或12岁时升读中学。

5、They've been best friends since they were children.

他们从孩提时起就是最要好的朋友。