The gender ratio is very close to 1:1 and control measures have endeavored to maintain parity.

性别比非常接近1：1，而且采取控制措施力求维持均衡。

youdao

The gender ratio is very close to 1:1 and control measures have endeavored to maintain parity.

性别比非常接近1：1，而且采取控制措施力求维持均衡。

youdao