任何药都不能独立起效果，而是或多或少地受到很多其它因素的影响。

No medication works in isolation but is affected to a greater or lesser extent by many other factors.

《柯林斯英汉双解大词典》

一种设计效果很好，反复应用于其他地方，加上一些看似没什么影响的改进，突然有一天它就不奏效了。

Perhaps a design works so well. It is adopted elsewhere again and again, with seemingly harmless improvements, until, suddenly, it does not work at all anymore.

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通常在看病时，病人会首先见到接待人员，接待人员可以发现并告诉病人情况如何。这可能会影响治疗效果。

A usual visit to a doctor begins with a receptionist, who can see and tell how a patient is doing. This may influence the treatment effect.

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Similarly,I believe that if we wish to prevent drug abuse in teenagers who grow up in a neighborhood that puts them at risk, the effective prevention is not remedial.

同样，如果我们要防止,青少年受不良的社会环境影响,而滥用药物的情况，但预防的效果不佳。

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So this is not even thinking about the other electron shielding, just if we think of the fact, all we need to think about is that the effect of going to a further away n n as we go down the table.

到现在我们甚至还没有考虑,其它电子的屏蔽效果，即使我们要考虑这个因素，我们需要考虑也就是,沿着周期表的某一列往下走，距离会逐渐变远,将起最重要的作用，actually，dominates,这一结果所产生的影响。

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