If the two media have really different densities, like air and water, then most of the energy is going to be reflected back, very little of it will keep going and get transmitted into the new medium.
而如果这两种介质的密度相差较大，就像空气和水那样，那么大部分的能量将会折射回来，只有一小部分会继续传播进入到新的介质中。
It causes environmental problems, like air pollution and temperature rise.
它可导致环境问题，如空气污染和温度上升。
Stories were like air to me and while other kids played ball or went to parties, I lived out adventures through the books I checked out from the library.
故事对我来说就像空气一样，当别的孩子打球或参加聚会的时候，我却通过从图书馆借来的书，过着冒险般的生活。
I miss you like air, is my only indispensable.
我对你的思念如同空气，是我唯一不可缺少的。
Future social networks, she thinks, "will be like air."
她说，未来的社交网络，“将像空气一样。”
Good health, like air, is essential to human beings.
好的健康，就像空气，是人类所必需的。
They need something to move through, like air, water, or rock.
声波传递需要介质，空气，水，岩石都行。
But sometimes, happiness is just like air around every one of us.
其实快乐很简单，它就像空气一样存在在我们身边。
Her basic thesis is that in the future, 'social networks will be like air.'
她的基本观点是，在未来，‘社会化网络就像是空气’。
At that moment the tension went out of the room like air going out of a balloon.
在那一刻，紧张的气氛顿时烟消云散，就像气球泄气那样。
Since he received the iPad, Owen has been trying to read books, and playing around with apps like Air Guitar.
自从收到iPad后，欧文一直在努力读书，玩一些应用程序，如空气吉等。
Like air traffic controllers, these technicians coordinate every movement of every ship through every lock.
和航空塔台一样，技术员调度每艘船通过各船闸的所有动作。
For me, creativity is like air, it's a life force that some people require for survival and I'm one of those people.
对于我来说，创造力就像空气，是生活中每个人生存的必需因素，而我就是其中之一。
Perhaps that is because computers are less visibly polluting, or their use is not deemed, like air travel, to be frivolous and unnecessary.
或许，这是因为电脑的污染更加不易被察觉，或者其之使用不像航空飞行一样被认为是不重要且不必要的。
It's interesting that the share of those labeling things like air conditioning and microwaves as necessities is (and was at the peak) so low.
那些诸如空调与微波炉标注为必需品的东西所占的份额很低(即使最高值也不例外)，这很有意思。
It will swivel on its chrome foot, but although it has a business-like air its reclining Angle makes it better suited for a nightcap than working at a desk.
它能在铬合金制造的脚架上旋转，尽管看起来商务气息十足，但倾斜的椅背令其更适合睡前小憩，而不是伏案工作。
Some of the new tools now being launched to create a single profilethat can be used across social networks will as analysts predict makesocial networks like air.
目前发布了一些新工具，可以制作在各个社会网络间使用的个人档案，像某些分析人士预言的那样，这些工具会使得社会网络像空气一样不可或缺。
We leave through the steel doors and head up the ten-story elevator, past the retinal scanner, and through glass Chambers with sliding doors that seem like air locks on a spaceship.
我们从那个大铁门离开，乘着电梯从地下十层来到地上，先通过视网膜扫描，然后穿过一个带有滑动玻璃门好像飞船的空气舱一样的玻璃房间。
The excessive use of any electricity-powered machines like air conditioners will accelerate global warming, raising temperatures." said Lee Boon-ying, director of the Hong Kong Observatory.
过度使用空调等电器将加速全球变暖进程，导致温度升高。
Air France first-class seats recline almost like beds.
法国航空公司头等舱座位的靠背可以向后倾斜得几乎像床一样。
"I thought you did not like fresh air," he said.
“我还以为你不喜欢新鲜空气。”他说。
"I don't like fresh air when I am by myself," replied the Rajah; "but my cousin is going out with me."
“要是只有一个人，我不喜欢新鲜空气，”小王公回答，“但这次，有我表妹陪我出去。”
High thin clouds are very transparent to solar radiation, like clear air.
太阳辐射可以轻易地通过高空薄云层，就像通过空气一样。
The two children were already flying down the Alp, like birds soaring through the air.
两个孩子已经从着高山牧场往下猛冲了，就像鸟儿在空中翱翔一样。
The air tank contains high-pressure purified air and is exactly like the tank used by a SCUBA diver.
空气瓶内装有纯净高压空气，很像SCUBA 潜水员用的气瓶。
They have small air pockets like honeycombs.
它们有像蜂巢一样的小气囊。
Nothing has ever taken to the air like HB-SIA, as the Swiss aircraft is known.
从来没有一架飞机像这架叫做HB-SIA的瑞士飞机那样子飞行过。
Nothing has ever taken to the air like HB-SIA, as the Swiss aircraft is known.
从来没有一架飞机像这架叫做HB-SIA的瑞士飞机那样子飞行过。
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