These studies are summarized in his book, a Treatise on the Family, written in 1981.

这些研究被总结在他的一本书里，在一篇1981年写的关于家庭的论文里。

youdao

These studies are summarized in his book, a Treatise on the Family, written in 1981.

这些研究被总结在他的一本书里，在一篇1981年写的关于家庭的论文里。

youdao