英语阅读能力依靠什么？必然是词汇的积累，但，仅仅是词汇的积累是不够了，更应该了解英语句式，不同句型所表达意义。如何培养自己的阅读语感呢？那么就跟着聚创考研官网小编每天学一点英语，一起为考研筑起坚实的地基。阅读是需要积累的，就像我们需要经常和人沟通才会促进我们的表达能力一样~小伙伴跟着小编一起，每天坚持打卡，培养英语阅读能力及语感，了解文章一些经典词汇的用法。

经济学人：水珠在油面快速滑动的秘密（上）

This is Scientific American’s 60 Second Science. I’m Sarah Vitak.If you are kitchen-savvy, you probably know “the water test” method for getting stainless steel pans to the right temperature.All you have to do is splash a few drops of water in a pan as it is being heated.When the pan reaches the right temperature, instead of evaporating, the drops form into beads and skate all over the pan.You have to do this test in an empty pan.And that is because, as the not-kitchen-savvy among us may have learned the hard way, mixing oil and water in a hot pan is a recipe for flying burning hot liquids.The phenomenon that happens when beads of water skate around in your empty pan has been understood for a long time.

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这里是科学美国人——60秒科学系列，我是莎拉·维塔。如果你经常下厨，你可能知道测试不锈钢平底锅是否达到合适温度的“水滴”法。你要做的就是在加热时往平底锅里洒几滴水。当平底锅达到合适的温度时，水滴不会蒸发，而是会形成水珠，滑过平底锅各处。你必须在无油空锅里做这个测试。这是因为，某些厨房小白或许有过将油与水混合在一起的惨痛经历，这会让滚烫的油水液体四处飞溅。人们很早就观察到了水珠在空锅里滑来滑去的现象。

Here is Dr. Kripa Varanasi from the mechanical engineering department at M.I.T. explaining it:They’re levitating on their vapor layer with the vapor cushion that’s forming because the liquid is evaporating.And so they can move around with very little friction: that’s called the Leidenfrost state.And then, if you’re at a lower temperature, you could start boiling the drop, but the drop is sticking to the surface.But recently Dr.Varanasi and his graduate student Victor Leon set out to look at hot oil and water interactions a bit more closely.What we found here that’s very interesting is: When you have a thin oil layer, you have the drop on it, you still can get both those states.
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以下是麻省理工学院机械工程系的克里帕·瓦拉纳西博士的解释:水在蒸发时会形成隔热的蒸汽层，水珠悬浮在蒸汽层上。水珠四处滑动时摩擦力极小，这种现象被称为莱顿弗罗斯特效应。如果锅里温度较低，水滴就会开始沸腾，但是它们会附着在锅面上。但最近，瓦拉纳西博士和他的研究生维克多·莱昂开始更仔细地研究热油和水的相互作用。我们发现了非常有趣的现象: 如果锅面有一层薄薄的油层，而油层上有水珠，仍然可以得到这两种状态。

But in between, there is another state, and it can cause it to race at very high speeds on the surface.The experiments were so simple, you could run them in your kitchen.They just used a hot plate with either a metal plate or a silicon wafer on top, then the oil (they used silicon oil), then a syringe to precisely place a water drop.The one thing they did a little more precisely than you would in the kitchen is that they applied the oil by spin coating, a process that creates a very thin and very uniform surface.Their oil layer was about 10 microns, or about a hair’s width thick.They used high-speed imaging equipment to capture the result.

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但在两者之间，还存在另一种状态，能让水珠在锅面高速滚动。实验非常简单，你可以在厨房里进行。研究人员只用了一块热板，可以是一块金属板，也可以是一块硅片板，涂上油(他们使用的是硅油)，然后用注射器精确地滴下水珠。相比你在厨房里的实验，实验室里更精准的地方在于涂油时他们用到了旋涂法，这样能够涂出极薄且非常均匀的油层。油层厚度大约为10微米，只有头发丝直径的一半。研究人员使用高速成像设备对实验结果进行成像。

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