独生子女 [dú shēng zǐ nǚ] [词典] the only child; only son [daughter]; China one; [例句]如何教育好独生子女,这给我们提出了新的课题。How to educate an only child is a new problem for us.
the only child如:He is the only child in the family.他是家里的独生子女。one-child如:China adopted the one-child policy to curb population growth.中国曾采用独生子女政策,控制人口增长。two-child 二胎如:China has adopted the two-child policy for a few years.中国采纳二胎政策已有几年。