SSS 2009-07-21
时间：2019-01-08 作者：英语课 分类：Scientific American(七)月
This is Scientific American's 60-Second Science. I'm Karen Hopkin . This will just take a minute.
When you get caught in a downpour, you probably don’t think about the size of the raindrops that assault you as you run for cover. But physicists 1 do. And they’ve come to the conclusion that the drops that hit the ground, or your head, are the shattered remains 2 of bigger drops that fell from the clouds.
Raindrops come in a variety of sizes, even within the same storm. And scientists used to think that, to get that kind of distribution, raindrops must crash into each other on the way down, breaking up into smaller droplets 3 or coalescing 4 into larger ones. Now a team of French scientists has produced high-speed footage of falling water droplets. And they find that drops of different dimensions don’t require collision—they come from the fragmentation of individual, isolated 5 droplets. Their results appear online in the journal Nature Physics.*
The video evidence reveals that water droplets first flatten 6 out as they fall. And as these plummeting 7 pancakes get wider and thinner they eventually capture air, forming what look like little plastic grocery bags floating in a breeze. And when the bags get big enough, they pop. And you’re left wondering why you can never remember your umbrella.
Thanks for the minute, for the Scientific American's 60-Second Science. I'm Karen Hopkin
- For many particle physicists, however, it was a year of frustration. 对于许多粒子物理学家来说，这是受挫折的一年。 来自英汉非文学 - 科技
- Physicists seek rules or patterns to provide a framework. 物理学家寻求用法则或图式来构成一个框架。
- He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
- The remains of the meal were fed to the dog.残羹剩饭喂狗了。
- Droplets of sweat were welling up on his forehead. 他额头上冒出了滴滴汗珠。 来自辞典例句
- In constrast, exhaled smoke contains relatively large water droplets and appears white. 相反，从人嘴里呼出的烟则包含相当大的水滴，所以呈白色。 来自辞典例句
- A mental model begins coalescing in their minds. 一个意识模型开始结合到他们的脑子里。 来自互联网
- On the basis of coalescing this kind of element can separate oil from compressed air. 采用凝聚原理，分离压缩空气中的油份。 来自互联网
- His bad behaviour was just an isolated incident. 他的不良行为只是个别事件。
- Patients with the disease should be isolated. 这种病的患者应予以隔离。
- We can flatten out a piece of metal by hammering it.我们可以用锤子把一块金属敲平。
- The wrinkled silk will flatten out if you iron it.发皱的丝绸可以用熨斗烫平。
- Prices are rising, falling, going up, going down, shooting up, plummeting, etc. 物价在上涨、下跌、上升、下落、猛然上涨、骤然下跌等。 来自辞典例句
- The enemy plane went plummeting into the sea. 敌机直直掉进海里。 来自辞典例句