Family in growing numbers has only one child, therefore, parents oftentimes focus all their attentions on that child and exert much pressure on him or her.

只育有一个孩子的家庭越来越多，因此，父母往往把所有的注意力都放在那个孩子身上，对其施加很大的压力。

youdao

My aunt has only one child, and she wants a second child.

我姑姑只有一个孩子，她想要第二个孩子。

youdao

A couple who have only one child are allowed to have a second baby in China.

在中国，只有一个孩子的夫妇可以生二胎。

youdao

But not a single child and only one woman was saved.

VOA: special.2009.11.11

Torbay have only one child waiting for adoption at present and a family has been allocated for the youngster.

BBC: Councils failing adoption process

These included rewards for having only one child and planting trees.

ECONOMIST: China

That is, each female may give birth to only one child.

FORBES: U.S. Needs Immigration Reform - Part 3