当然，控制如果不使用是没有效果的。

Of course, no control is effective unless it is used.

youdao

试图不去感知是没有效果的并且还是有害的。

Trying not to feel something is ineffective and can be harmful.

youdao

志愿者们都患有对与药物治疗没有效果的癫痫。

The volunteers all had epilepsy which had not responded to drug treatments.

youdao

So it's almost as if functions really are useless because they have no ultimate effect.

所以几乎是函数是没起作用的,因为它们没有最终的效果。

哈佛公开课 - 计算机科学课程节选

Therapy for free tends to be useless therapy.

免费的心理治疗往往没有什么效果。

耶鲁公开课 - 心理学导论课程节选

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。

麻省理工公开课 - 化学原理课程节选