我们的作用是确保学校与家长间的联系。
30分钟的乘车费用是2美元。
费用是136美元8节课。
夏令营的费用是每个学生270美元。
多年来，盐的最重要的作用是保护食物。
For many years, salt's most important job was to protect food.
回收利用是一种将垃圾转化为新产品的方法。
Recycling is a way to take rubbish and turn it into new products.
一个主要的应用是扑灭驾驶舱的火焰。
应该有一个监管机构确保氦的使用是谨慎的。
A regulatory agency should ensure that helium is used carefully.
迪尔凯姆提出宗教信仰的作用是加强社会团结。
Durkheim proposed that religious beliefs functioned to reinforce social solidarity.
它的作用是在章鱼逃跑时分散捕食者的注意力。
It serves to distract a predator while the octopus makes its escape.
我们对化石燃料的使用是温室气体过量的主要来源。
Our use of fossil fuels is the main source of excess greenhouse gases.
政府在经济中的作用是通过破坏垄断和特权来促进竞争。
Government's role in the economy was to promote competition by destroying monopolies and special privileges.
诱饵效应起作用是因为我们大脑在做选择时会确定选择的价值。
The decoy effect works because of the way our brains assign value when making choices.
毒品滥用是指合法或非法使用毒品伤害某人或是某人身边的人。
Drug abuse is the use of a drug, legal or illegal, that hurts a person or someone close to him.
第五代通讯技术的应用是有可能实现的，并且有着非常广阔的前景。
There is a prospect of applying 5G, which is very promising.
如欲体验滑翔伞飞行，请与起飞场地的教练李铁民联系。费用是每人300元。
Please contact Li Tiemin, coach on take-off venue when you want to experience paragliding flight. The cost is 300RMB per person.
这三个理论都有可能是正确的。特别是香水作为气味掩饰的作用是显而易见的。
All three theories could be true. In particular, the role of perfume as an olfactory disguise is obvious.
卡罗摄影法对化学处理纸的使用是革命性的，其中光照区域色调变暗，形成负像。
The calotype was revolutionary in its use of chemically treated paper in which areas hit by light became dark in tone, producing a negative image.
相反，他们会得到固定的费用，通常一节标准四小时声乐课的费用是825美元。
Instead, they receive a fixed rate, which is typically about $825 for a standard four-hour vocal session.
这十分相近，但是总体上来说，云的累积作用是降低地球的温度而不是让地球升温。
It's very close, but overall the cumulative effects of cloud are to cool Earth rather than heat it.
不过，她并不认为这种对音乐的使用是理想的，她相信自己总有一天会完全摒弃音乐。
She did not regard this use of music as ideal, however, believing that she would someday dispense with music entirely.
我相信你们都知道回收利用的重要性。回收利用是指回收旧物品，并且把它们变旧为新。
I'm sure you all know how important recycling is. Recycling is when you take old things and turn them into new things.
几乎所有的内部细节都是由铸铁或石膏铸成的；减少木材的使用是出于确保消防安全的考虑。
Almost all of the interior detail is of cast iron or plaster; the use of wood was minimized to insure fire safety.
根据我们现有的数据，我们无法确切了解灵长目动物与大型食肉动物之间的相互作用是什么。
With our present data, we don't know what precisely the interactions were between a primate and a big carnivore.
它获取植物在光合作用过程中产生的能量，光合作用是一个将太阳光转化为植物自身能量的过程。
It captures the energy which plants produce during photosynthesis—a process of converting sunlight into energy.
但Werbach说，“游戏化”这个词和这个概念的广泛、有意识的应用是在大约五年前才真正开始的。
But the word "gamification" and the widespread, conscious application of the concept only began in earnest about five years ago, Werbach says.
坟墓的费用是如此之高，以至于大多数人选择租一个坟墓3年。甚至在遗体被挖出之后，仍然不能长久地安息。
The cost of the grave is so great that most people choose to rent a grave for three years and even after being dug up, lasting peace is still not guaranteed.
另一个作用是保护——这也不像以前那么重要了，但是毛发仍然对身体的某些部位有好处，比如头部和眼睛周围。
The other is for protection—and again this isn't as significant as it was once, but hair does still benefit areas of the body such as the head and around the eyes.
把你的清洁工具——一块湿抹布或海绵——悬挂起来留到第二天使用是很诱人的，不过那样也会使它们成为细菌的滋生地。
It's tempting to leave your cleaning implement—a damp rag or sponge—hanging around to use the next day, but that could create a germ breeding ground.
你如何解释在科罗拉多州博尔德市，医疗保险的平均费用是9103美元，而在一小时车程远的科罗拉多州柯林斯堡，费用却是6448美元？
How do you explain that in Boulder, Colo., the average cost of medicare treatment is $9,103, whereas an hour away in Fort Collins, Colo., the cost is $6,448?
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