child/ tʃaɪld /

1.noun [c] 
儿童

2.noun
(son,daughter) 孩子

Their children are all married.
他们的孩子都结婚了。
a father and his two teenage children
一位父亲和他的两个十几岁的孩子
she's just had her second child
她刚生了第二个孩子