英语翻译"因为中国人口增长过快;二十世纪八十年代开始实行计划生育;大部分中国家庭是独生子女."整句翻译...可以增加一些简单的细节，让这句话更流畅一点。

dearcc2的答案比较好.

因为中国人口增长过快;二十世纪八十年代开始实行计划生育;大部分中国家庭是独生子女。
Due to the overgrow of population , China has started one-child family policy from 80's, and thus most family have only one child.

Because of the overquickly increasing population,the * began to carry out the family planning in 1980s;there is only one child in most of the family.

The population of China is because they're too quick to increase; It's begun to carry out plan growing in the 20th century 80 's; Most's Chinese home is the only child.

Because of the fast increasing of population in China,It began to carry out family planning in 1980"sMost of Chinese families are only one child.

Because the population of China is increasing so quick.We carry out the family planing in the 20th century 80s.Most Chinese family has only child！

Because the populatution of china increased quickly;our country
carried out birth control in 1980s.Most families in china is the only child.