是复数。

Most of the children in this area are studying in kindergartens.

这个地区的大部分孩子都在幼儿园里读书。

These poor children have received assistance and love from the public.

这些可怜的孩子们得到了社会民众的援助和关爱。

A small group of children waited outside the door.

一小群孩子在门外等候。

The children are at the park.

孩子们在公园。