一个小孩

a child

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phrase Rare #21,023
a child 一个 can mean “a” or emphasize “one.”
CH: 公园里有一个小孩在玩球。
EN: There is a child playing ball in the park.

他们留下一个小孩

They left a child behind.

— A Sun (2019)

不如生一个小孩吧

Why don't we have a baby?

— 甜蜜蜜 (1996)

我不会嫁给一个小孩!

I won't marry a child!

— 埃及艳后的任务 (2002)

是的,一个小孩

Yes, a child.

— 巴德尔和迈因霍夫集团 (2008)

后来我很快就跟一个同学结婚还生了一个小孩

Later, I quickly married a classmate and had a child.

— 一一 (2000)