The parameters of AG model correlate strongly and at least one parameter can be fixed before the searchroutine.
AG模型参数表现出很强的相关性，如果四个模型参数同时作为自由变量可能会得到不合理结果。
2
Search engines are pretty smart on many things, but they're still pretty "dumb" when it comes to dealing with many of the routine changes that web site owners make.
搜索引擎许多情况下非常聪明，但如果应对由网站所有人更改了的许多惯例，搜索引擎还是非常“笨的”。
3
Don't write the routine to search for non-numerical values and mark it as invalid if any are found.