这些代码维护起来会很麻烦，而为避免不必要的查找以及执行适当的错误检查就更加困难(参见“捕获错误”部分)。
This can be cumbersome to maintain, and it can be more difficult to perform appropriate error checking (see the section, "Trap for errors") and to avoid unnecessary lookups.
如果你做到这些，你将确保旅行快乐，并且避免不必要的麻烦。
If you must do this, you will surely enjoy travels and avoid any unnecessary troubles.
然而，为了在帮助别人时避免卷入不必要的麻烦，选择一个合理的方式是最好的。
However, in order to avoid involving in unnecessary trouble when helping others, it would be better for us to choose a reasonable way.
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