be useful for navigation
对导航有用
以上为机器翻译结果，长、整句建议使用 人工翻译 。
For this reason, it is advisable not to delete navigation sections that might be useful later, even if they are unused.
鉴于这个原因，最好不要删除现在尚未使用的部分，因为以后可能会用到它们。
youdao
Still, the highly touted NavPix feature was so useful for navigation that the reviewer claims it will be emulated " much like the iPod clickwheel" soon enough.
ENGADGET: Navman iCN 750 GPS navigator with NavPix reviewed
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