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杭州江干区治疗内痔哪家医院好排名哪里飞度咨询在线咨询西湖区肛肠医院看肠道疾病好不好

2018年01月17日 21:36:08
来源:四川新闻网
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Acid Water酸雨What are you doing outside, Don? Its about to rain.Don你在干嘛呢?这天都快下雨啦!Im setting out bottles.我在放瓶子。I can see that. But why?我看得出来!你放瓶子有什么用呢?For my new business venture. Bottled rainwater!做新的投资啊。瓶装雨水!As in living plastic bottles out in the rain and then selling them as health drinks?就像这样子把生活塑料瓶放在雨中装雨水,然后再把它们当健康饮用水卖了?Exactly! What could be more pure and fresher than what straight from the heavens!一点不差!还有什么水比从天上直接降下来的水更纯净更新鲜呢!Maybe water from the a mountain stream!或许山泉水可以!You see any mount stream around here?那你在附近有看到山泉吗?Fine. But rainwater isnt exactly pure, Don. Its got a lot chemicals.好吧,是没有。但是雨水绝不是那么纯净的。雨水中有许多化学物质。Like what?比如说?Well, even without industrial pollution, atmospheric carbon dioxide dissolved into clouds makes rainwater at least slightly acidic.嗯……即使是没有工业污染,空气中的二氧化碳被云层吸收也会使雨水呈弱酸性。Oh!噢!But here in Indiana, a rain is almost ten times more acidic than natural rainwater.但是,我们印第安纳州雨水的酸性比天然雨水要高出整整十倍!Why?这又是为什么啊?Well, a lot of power plants and other factories that burn coal to make energy in this Midwestern state. Burning coal releases sulfur and nitrogen oxides into the atmosphere, which make rain more acidic.在这个中西部城市,有许多的发电厂和其他的工厂都是靠烧煤来产能的。煤燃烧时会产生硫和氧化氮,挥发到大气中,使这里的雨水呈较强的酸性。That does sound good! What would happen if you drag a rainwater?这个听起来确实很有道理!那如果人喝了这些酸性的雨水又会怎么样呢?Nothing! The acid content isn’t high enough to harm humans, and it doesn’t affect the taste of the water, either. But acid rain can damage lakes, streams, and harm trees at high elevations. Also, acid rain accelerates the decay of buildings, statues, and sculptures.那倒没事。雨水的酸含量不高,不会对人体造成什么伤害,也不会影响水的味道。但是,酸雨会影响湖泊,溪流,以及高海拔地区的树木植被。同时,酸雨还会加快建筑物,雕像,雕塑等的腐蚀。 /201212/216809杭州肛肠医院总院看肠炎好不好浙江大学医学院附属儿童医院肛肠痔疮便血肛门异物治疗好吗浙江中医药大学附属第三医院看痔疮多少钱

杭州市牙科医院肛肠外科滨江区肛门疼痛肛周脓肿脱肛肠炎便秘治疗多少钱淳安县妇幼保健人民中医院治疗直肠黏膜内脱垂价格During the space shuttles third flight, back in nineteen eighty two, astronauts Jack Lousma and C. Gordon Fullerton saw something remarkable. Above the tail of the shuttle, where there should have been empty space, they saw a faint orange glow instead, flickering with ghostly light. Was the space shuttle haunted? What was going on?时光倒转回1982年,在宇航员杰克·洛思马和查尔斯·戈尔登·福勒顿进行第三次航天飞行时,他们看到了惊奇的一幕。在飞机尾部原应是空白的地方,出现了微弱的橙色辉光,诡异地扑闪着。难道航天飞机上也闹鬼?这到底是怎么回事?To understand this phenomenon, known as ;shuttle glow,; you should know something about the region of space where the shuttle orbits. NASA shuttles stay in low Earth orbit, which is generally about a hundred and seventy miles above the Earths surface. At that height, the atmosphere has tapered away to almost nothing--less than a billionth of the pressure it is at ground level--but there are still gasses there. Indeed, low Earth orbit is well within the ionosphere, a major part of our atmosphere.为了弄清楚“航天飞机辉光”这一现象,有一点你应该注意到,那就是航天飞机飞行轨道所在的区域。美航局的飞机飞行时,一般保持在近地轨道上,即距离地表一百七十英里的地方。在这样的高度,大气程锥形逐渐减少——大气压力比地表的十亿分之一还小——但这里仍然有空气存在。实际上,近地轨道基本被电离层覆盖。而电离层是大气的重要组成部分。The thin gasses of the ionosphere rush past the space shuttle at about five miles per second, forming a very fast, very thin wind. This wind is so thin youd never be able to feel it, even if you stuck your head out the space shuttle window the way a dog sticks its head out a moving car. The wind causes two things to happen.飞机以每秒5英里的速度驶过之后,电离层稀薄的空气就会形成一股快速流动的细风。人类无法感觉到这种细风,即使你将头伸到飞机窗外(像一样将头伸出飞速行驶的汽车)也感觉不到。这种细风会引起两件事情。First, it erodes the surfaces of some materials.The erosion is slight, but it can be significant for camera lenses or other sensitive equipment. Second, the shuttles surface can scoop up atoms from this wind, and these atoms can undergo chemical reactions. One reaction, involving nitrogen and oxygen, can produce a luminous orange glow. And thats what the astronauts saw. It wasnt a ghost--it was shuttle glow.第一,它会侵蚀一些材料的表面。这种轻微的侵蚀用照相机或者其它敏感的设备看很明显。第二,航天飞机的表面会从细风中捕获原子,并且这些原子能发生化学反应。有一种氮和氧的反应就能产生明亮的橙色辉光。这就是宇航员所看到的光。它不是鬼火,而是辉光。原文译文属!201209/200518杭州市余杭区第二人民医院看结肠炎好不好

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