儿童的单数怎么说英文怎么说

儿童的单数英语是 "child"。

来源：这个词源自古英语中的 "cild"，最初来自古北欧语"kulþaz"。

英文例句及中文翻译：

The child is playing with a toy. (这个孩子在玩玩具。)
Each child has their own unique talents. (每个孩子都有自己独特的天赋。)
The child's parents were worried about their safety. (孩子的父母担心他们的安全。)