He liked the book very much and read it back and forth.

他非常喜欢这本书，来回地翻看。

youdao

They discussed it back and forth, without getting very far.

他们来来回回地讨论，没有很大进展。

youdao

They discussed it back and forth, without getting very far.

他们来来回回地讨论，没有很大进展。

youdao