他们观察背后的假设需要被检验。
The assumptions behind their observations need to be examined.
它是一项不朽的科学发现，而且它的出现说明了观察、预测和检验（科研进程中必须的活动）之间基本的相互影响。
It is a monumental scientific achievement, and its development illustrates the essential interplay between observation, prediction, and testing required for scientific progress.
在后续的医生访问和检验中，观察等待成本只有几千美元。
Watchful waiting costs just a few thousand dollars, in follow-up doctor visits and tests.
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