People become immune to your tricks and they just become less and less effective each time.

人们对你的把戏免疫了，每次都变得越来越不有效。

Worryingly, these tools may become less effective.

令人担忧的是，这些工具可能会变得不那么有效。

They also make prison less effective.

还降低了监狱的效率。

But that trick might be less effective than you think.

但这个小把戏也许并没你想象中那么有效。

And experts say this makes them less effective at their homework.

而专家表示这会使得他们完成作业的效率降低。

But isn't it true that they are less effective among older people?

但疫苗对老年人有效率较低，这不是真的吗？

The longer the shift, the less effective the employee may become.

一个轮班的时间越长，员工的工作效率可能就越低。

This makes antibiotics less effective when they are used to fight diseases in humans.

这使得抗生素在被用于对抗人体疾病时的效果更差。

And in particular, one study showed that it was less effective in endurance-trained elite athletes.

特别是，一项研究表明，它在耐力训练有素的精英运动员中效果较差。

This makes voting seem less effective.

这让选举变得似乎不那么有效。

But the vaccines are less effective in children who do not have a good, healthy diet.

但是对那些没有良好健康饮食的儿童来说，疫苗效果较差。

These can move to other areas in hot weather and are less effective in high temperatures.

它们在炎热的天气下可能会转移到其他区域，在高温下效果较差。

We tried to get monoclonal antibodies, knowing that with every day that passed, that treatment became less effective.

我们设法去购买单克隆抗体，因为我们知道，每过一天，治疗效果都会大打折扣。

But if it proves leakier than China's, it may be almost as expensive and a lot less effective.

但是，如果事实证明措施漏洞更大，那么在成本可能几乎同样高昂的情况下，但是效果要差得多。

The vaccines protected those who got both doses, but were less effective for those who got just one dose.

疫苗可以保护完全接种了两针剂的人群，但是对只接种了一针的人群效果不理想。

He reminds himself that not every lecture can be a Nobel winner; some will be less effective than others.

他提醒自己，不是每堂课都有诺贝尔奖的水准；总会有一些可得效果不如别的课。

Their reduced numbers can weaken their social network, making surviving fish more timid and less effective at controlling seaweed.

它们下降的数目能动摇它们的社交网，使得存留的鱼越加胆小，难以控制海藻。

It also said that " severe gaps" in weather observations, especially in Africa, were making early warning systems less effective.

世界气象组织还表示，在气象观测方面，各国也存在巨大差距，尤其是非洲，这也减弱了预先警报系统的效力。

A prolonged downturn could show that some of its tech is less effective than first thought.

长期低迷可能表明该公司的一些技术不如最初想象的那么有效。

The old games are proving less and less effective.

事实证明 过去的方式效果越来越差。