It is too brief, unfortunately, but perhaps that is consistent with the overall beginner-to-intermediate level of the book.

不幸的是这章太简短了，不过也许是考虑到本书是入门到中等层次的读物罢。

youdao

Developing a good breathing technique is perhaps the biggest challenge for beginner and intermediate swimmers.

对初学者和中级水平选手来说，开发一种良好的换气技术可能是一个非常大的挑战。

youdao

Well if that was a bit too "buttony, " or perhaps just too expensive for your beginner DJ pockets, how about that which you see above?

ENGADGET: Pioneer announces DDJ-WeGO two-channel DJ controller, provides entry-level jams