It never truly shows the actual down side effects of the drugs.

它永远不会真正展现出药物的负面作用。

But in terms of its actual effects, I don't think we have clear evidence yet that that particular policy response is having a major impact.

但就实际效果而言，我认为我们还没有明确证据表明该特定政策应对措施正在产生重大影响。

There is a strong correlation between self-perception and achievement, but there is evidence to suggest that the actual effect of achievement on self-perception is stronger than the other way round.

自我认知和成就之间存在很强的相关性，但有证据表明，成就对自我认知的实际影响要强于相反。

They also said that findings from animal cases suggest that their addiction-like behaviors happened only when they had intermittent access to sugar, believing those behaviors to come from the intermittent access, not the actual neurochemical effects of sugar.

他们还表示， 动物案例的发现表明， 只有当它们间歇性地获取糖时， 才会发生类似成瘾的行为，他们相信这些行为来自于间歇性的获取，而不是糖的实际神经化学作用。