This book has a narrow focus. But if you're in its target audience, it's worth a read.
这本书的针对面狭窄，但如果你是目标受众之一，还是值得一读的。
If you do that, you just focus on a certain narrow area.
如果你这么做的话，那么你的焦点就会变得很狭隘。
Many do-gooding outfits suffer from having too broad a focus and too narrow a base.
许多做好事的机构苦于基础过于狭窄而关注面太宽。
Tunnels narrow the focus of a piece and easily direct the eye.
地道压缩了作品的焦点，便于引导视线。
Tunnels narrow the focus of a piece and easily direct the eye.
地道压缩了作品的焦点，便于引导视线。
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