That's because the particles differ in the amount of solar energy that they prevent from reaching the ground.
这是因为硫化物颗粒和煤烟颗粒在遮挡太阳能到达地面的数量不一样。
From this perspective of relative rather than absolute supremacy, a superpower's strength lies as much in what it can prevent from happening as in what it can achieve.
从相对霸权而非绝对霸权的角度看，一个超级大国能阻止什么发生的力量同取得成绩的力量一样大，另一方面同样也在于它能阻止什么。
Relative poverty, however, did not prevent Martin from equipping himself with an excellent education.
然而相对的贫穷并没有妨碍马丁接受良好教育。
We hope to prevent anything unpleasant from happening.
我们希望防止任何不愉快的事发生。
Forcing a child to behave morally may prevent her from internalizing the lesson you're trying to impart.
强迫孩子按道德行事可能会妨碍她将你试图传授的教训内化。
It has some glue on it that has colored it slightly, but nothing that will prevent us from using it.
这封信上有一些胶水，对信件有些轻微的染色，但没有什么可以阻止我们使用它。
Even when employees are given paid time off, workplace norms and expectations that pressure them to overwork often prevent them from taking it.
即使给员工带薪休假，职场规范和要求他们加班的期望往往也会阻止他们休假。
Clara was painfully surprised and tried to prevent her father from carrying out his plan.
克拉拉非常吃惊，试图阻止她父亲实施他的计划。
Although we can't prevent an earthquake from happening, we can use some methods to reduce harm.
虽然我们不能阻止地震的发生，但我们可以用一些方法来减少伤害。
When we always stay with the same people, how can we break down the barriers which prevent us from getting to know people with different ideas?
当我们始终和相同的人待在一起，我们怎么能打破阻止我们去了解有不同想法的人的壁垒呢？
Peter only just came in time to prevent the goat from falling down over the very edge.
彼得刚好及时赶到，防止山羊从悬崖边上掉下去。
They eat algae and prevent it from overwhelming the coral.
它们以藻类为食，防止藻类压垮珊瑚。
Stretching out our arms and legs before doing a vigorous exercise can prevent us from getting injured.
在做剧烈运动之前伸展胳膊和腿可以防止我们受伤。
Learning to be mature and sensible can prevent us from becoming a constant source of worry to them.
学着变得成熟和理智可以防止他们不断为我们担心。
At this stage, there is no lightning-bolt solution, but two things would prevent matters from getting worse.
在这个阶段，没有闪电般的解决方案，但有两件事可以防止事情变得更糟。
You would have this initial response for chickenpox, and this initial response might be too slow to prevent you from getting chickenpox.
你会对水痘病毒产生这种初始应答，这种初始应答可能过于缓慢，无法预防水痘。
But if Congress wanted to prevent states from using their own resources to check immigration status, it could.
但如果国会想要阻止各州使用自己的资源来检查移民身份，它可以这么做。
Some experts consider that university libraries can prevent the public from entering certain areas.
一些专家认为，大学图书馆可以阻止公众进入某些区域。
Babies with congenital blockages that prevent this fluid from escaping from their lungs are sometimes born with deformed lungs.
有的婴儿具有先天性阻止这种液体从肺部流出的阻塞，他们时常是生有畸形肺部的。
This can prevent air from flowing freely to the lungs.
这可以防止空气任意流入肺部。
Too many irons in the fire can sap your energy and prevent you from seeing which path to take.
同时做太多的事情可能会消耗你的精力，使你看不清该走哪条路。
They might even feel driven to support government measures to prevent people from consuming this deadly stuff.
他们甚至可能会觉得有必要支持政府的措施，以防止人们吸食这种致命的东西。
At last, Greater London Council took actions to prevent this disaster from happening again.
最后，大伦敦区议会采取行动，防止这种灾难再次发生。
His mother convinced that he had to do something dramatic to prevent him from leading a life of failure, and laid down some rules.
他的母亲认为他应该做一些激动人心的事情以防止他过上失败的人生，所以他的母亲制定了一些规则。
The theory posited that this meltwater flooded into the North Atlantic, lowering the salinity and intensity of surface waters enough to prevent them from sinking.
该理论假设，这些融水涌入北大西洋，降低了地表水的盐度和强度，足以防止它们下沉。
We are finally waking up to the severity of the problem by supporting and developing a group of tools, apps and approaches intended to prevent scammers from getting through.
我们终于意识到问题的严重性，并通过支持和改进一系列工具、应用程序和方法以防止骗子得逞。
The doctors believe aspirin helps heart surgery patients because it can prevent blood from thickening and blood vessels from being blocked.
医生们认为，阿司匹林对心脏手术病人有利，因为它可以防止血液增稠和血管堵塞。
Take every precaution to prevent the flag from becoming soiled.
要采取一切预防措施，以防旗帜被弄脏。
Take every precaution to prevent the flag from becoming soiled.
要采取一切预防措施，以防旗帜被弄脏。
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