She's the middle child of three.

三个孩子，她是老二。

Riki was born middle child to the great dynasty of Tahlin.

里基是伟大的塔林王朝的二皇子。

Young Bill, the middle child, was a diligent learner, reading a whole set of encyclopedias.

排在中间的盖茨学习非常勤奋，曾从头到尾读完了一整套大百科全书。

I was the middle child of three, but there was a gap of five years on either side, and I barely saw my father before I was eight.

我在家中三子女中排第二，其余两位分别比我大五岁和小五岁，而我在八岁前很少见到父亲。

Excuse me, we just went over this. As the quintessential middle child, your addiction is rooted in your unmet need for attention.

打扰一下，我们刚才还练习过一遍。作为一个典型的中间儿，你的赌瘾，根植于你未被满足的对关注度的需求当中。