legal wife

Live morally, including practicing sex only in a legal marriage of a husband and a wife.

以德立身, 包括只在一夫一妻制的法定婚姻中行男女之事.

He is the eldest son of the legal wife in this family.

他是这个家的嫡长子.

My wife, who is Chinese, likes to joke that I was a child laborer, which is partly true, since I had a part-time job in a restaurant when I was12, which is below the minimum legal age.

我太太是中国人，她常常打趣说我当过童工。她说的倒也没错，因为我12岁的时候就在餐馆里打零工，当时还不到法定的工作年龄。

He decided to let the child of his legal wife inherit all his property.

他决定由家里的正出继承他所有的财产。

Nowadays, legal adoption of this kind is paired up with an arranged marriage of a daughter, meaning the adopted son becomes son and son-in-law at the same time because he changes his name to the wife's family name.

如今这类合法收养与女儿的包办婚姻相结合，即养子同时成为儿子和女婿，因为他会将自己的姓氏改为妻子的姓氏。