上海油压工作室为什么切洋葱会流泪英语美文

上海油压工作室　　It is not the strong odor of the onion that makes us cry, but the gas that the onion releases when we cut this member of the lily family.

　　The onion itself contains oil, which contains sulfur, an irritant to both our noses and to our eyes. Cutting an onion arouses a gas contained within the onion, propanethiol S-oxide, which then couples with the enzymes in the onion to emit a passive sulfur compound. When this upwardly mobile gas encounters the water produced by the tear-ducts in our eyelids, it produces sulfuric acid.

上海油压工作室　　In response to the caustic acid, our eyes automatically blink, and produce tears which irrigate the eye, and which flush out the sulfuric acid.

　　Another reflex to rid the eyes of a foreign substance, that of rubbing our eyes with our hands, often exacerbates the situation, because our hands are coated with the caustic, sulfuric acid producing oil from cutting the onion, which we then rub directly into our eyes.

　　Much to our chagrin, the only remedy for ridding the onion of its pungent, irritating oil is to boil it, not to slice it or dice it.

　　sulfur: 硫磺

　　irritant: 刺激

上海油压工作室　　enzyme: 酶

上海油压工作室　　tear-duct: 泪管

　　exacerbate: 加剧，恶化

上海油压工作室　　dice: 切成丁

上海油压工作室【为什么切洋葱会流泪英语美文】相关文章：

眼睛颜色为什么会变英语美文02-22

洋葱可能具有抑止骨质流失的作用英语美文02-23

你为什么不快乐英语美文02-16

不再为你流泪爱情美文03-03

宁愿开到你流泪伤感美文02-21

为什么越聪明的人越孤独英语美文02-20

关于想念到流泪的伤感美文11-20

买车为什么美文欣赏11-26

婚礼上为什么要砸蛋糕英语美文02-20