对那些坚信人定胜天的人来说，所有对上帝试验性的探索看来都是无必要的。
"The Kingdom Within You." For those with a faith that can move mountains, all this tentative groping for God in human experience may seem unnecessary.
这些诉讼风险增加了开始，迫使医生们在进行无必要的检测时进行[font=宋体]“防御式医疗”。
The risk of being sued pushes up costs, obliging doctors topractice “defensive medicine” in the shape of needless tests and procedures.[/align]
并且，在理想情况下，还希望不会给宿主服务器添加太多负载，不会触发无必要的动作，并且也不需要在适当的时间间隔内重复爬行这个Web站点。
And, ideally, doing so without adding too much load on the hosting server, triggering unwanted actions, and allowing repeated crawls of that Web site at appropriate intervals.
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