SSS 2010-01-12
时间：2019-01-08 作者：英语课 分类：Scientific American(一)月
If you’ve ever had a garden or grown flowers in a window box, you’ve probably heard that you shouldn’t water your plants at high noon because their leaves might scorch 1. Now a study in a journal called New Phytologist confirms that water droplets 2 can focus sunlight to the point that it burns, a finding that applies to plants and to people.
Check any gardening blog and the question of whether water can burn comes up with some regularity 3. But the problem had never been thoroughly 4 tested. So scientists at Eotvos University in Budapest decided 5 to do just that. And they found that the results depend on how hairy you are.
On leaves that are really smooth, like those from a maple 6 tree, water doesn’t do much damage. But leaves that have tons of tiny hairs, like a fern, can hold spherical 7 water droplets in focus above a leaf’s surface. Those drops act like mini magnifying glasses, focusing the sunbeams on an area that will subsequently fry.
And the same is true on you. Cooling off in the pool might seem like a stellar idea. But the resulting water droplets, propped 8 up by your body hair, poolside, could turn you from lounger to lobster 9.
—Karen Hopkin
- I could not wash away the mark of the scorch.我洗不掉这焦痕。
- This material will scorch easily if it is too near the fire.这种材料如果太靠近炉火很容易烤焦。
- 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
- The idea is to maintain the regularity of the heartbeat.问题就是要维持心跳的规律性。
- He exercised with a regularity that amazed us.他锻炼的规律程度令我们非常惊讶。
- The soil must be thoroughly turned over before planting.一定要先把土地深翻一遍再下种。
- The soldiers have been thoroughly instructed in the care of their weapons.士兵们都系统地接受过保护武器的训练。
- This gave them a decided advantage over their opponents.这使他们比对手具有明显的优势。
- There is a decided difference between British and Chinese way of greeting.英国人和中国人打招呼的方式有很明显的区别。
- Maple sugar is made from the sap of maple trees.枫糖是由枫树的树液制成的。
- The maple leaves are tinge with autumn red.枫叶染上了秋天的红色。
- The Earth is a nearly spherical planet.地球是一个近似球体的行星。
- Many engineers shy away from spherical projection methods.许多工程师对球面投影法有畏难情绪。
- He sat propped up in the bed by pillows. 他靠着枕头坐在床上。
- This fence should be propped up. 这栅栏该用东西支一支。