From the reasoning of conception, the author considered book spine as the chine and back bone of book.

通过概念的层推，笔者认为书脊就是书的脊梁、中枢。

youdao

From the reasoning of conception, the author considered book spine as the chine and back bone of book.

通过概念的层推，笔者认为书脊就是书的脊梁、中枢。

youdao