You must also note its date of publi-cation because travel is a very practical affair and many things change quickly in the twenty ?first century Finally ,you should make sure that the contents are well presented and easy to find.

• 同时你也要注意书籍的出版时间，因为旅行是非常实际的事情，而且在如今世间万物变化都很快，必须要确保内容都是标注清晰的，并且容易发现。