日期：2020-05-14 he ozone layer depletion is harmful to the environment. The ozone layer or ozone shield is a region of Earths stratosphere that absorbs most of the Suns ultraviolet (UV) radiation. It was discovered in 1913 by the French physicists Charles Fabry and... 阅读全文>>

日期：2020-05-14 Renewable energy is energy that is environment-friendly because it is collected from renewable resources, which are naturally replenished. Examples of these renewable resources include sunlight, wind, rain, tides, waves, and geothermal heat (i.e.the... 阅读全文>>

日期：2020-05-08 你知道吗？你经常用的智能机能源消耗比你家里的冰箱还要多。 What do you think are the biggest energy users in your home? Your list most likely includes your A.C., fridge, washing machine, etc. But you would be surprised to know that your smart phone is... 阅读全文>>

日期：2020-05-08 Everybody knows these four tastes: sweet, sour, bitter, and salty. But did you know there was a fifth one? Well, dont feel too bad; it wasnt even recognized by the scientific community until the eighties. The fifth taste is called umami （鲜味）, wh... 阅读全文>>

日期：2020-05-07 The cherry-tree is a small tree which grows to a height of about twenty feet. Its stem is covered with a smooth brown bark, and its green leaves have saw-like edges, somewhat like the leaves of a rose-bush. 樱桃树是一种可以生长到20英尺左右高的小树。... 阅读全文>>

日期：2020-05-07 All through the summer, and during spring and autumn as well, our meadows and waste places are thickly dotted with the bright-yellow flowers of the common weed called the dandelion. And even throughout the winter the leaves of this hardy plant remai... 阅读全文>>

日期：2020-05-07 Have you ever seen a hive of bees? Some hives are made with glass sides, through which we can see all that the bees are doing. 你有没有看到过蜂箱? 有些蜂箱的侧面是玻璃的, 你可以透过它们看到里面蜜蜂的活动情况。 In early summer each perfect hive conta... 阅读全文>>

日期：2020-05-06 孤独不利健康绝对和肥胖一样糟糕，可能也和吸烟一样有害。因此，在疫情肆虐的日子里，在许多地方，人们被迫独处，如何阻止独处转化为孤独是一个紧迫的医学问题。 Loneliness is bad for your healthcertainly as bad as being obese, and possibly as bad as being a m... 阅读全文>>

日期：2020-05-06 You may have heard the name Michelin because its related to Michelin tires. 你或许听过米其林这个名字，因为它和米其林轮胎有关。 See, in the year 1900, the tire manufacturers Andre and Edouard Michelin?created something called a Michelin Guide. 1900年... 阅读全文>>

日期：2020-04-26 研究人员已经知道，全球各地的女性寿命都比男性长。科学家们认为，男女预期寿命差异很大程度上与生物学上的生存因素有关。 Researchers already know that women live longer than men in all parts of the world. Scientists have largely linked the difference in li... 阅读全文>>

日期：2020-04-23 In many ways, plastic is the perfect materialwe can make it strong and rigid enough to build spaceships and replace bones, or thin and flexible enough to make shopping bags that weigh as much as a nickel but carry up to eight kilograms. And unlike o... 阅读全文>>

日期：2020-04-21 袋鼠在澳大利亚很常见的动物。它们有强有力的后腿，大大的脚更适合跳跃，还有一条长长的尾巴保持平衡，以及一个比较小的头。 Kangaroos are endemic to the country of Australia. They have large, powerful hind legs, large feet adapted for leaping, a long muscu... 阅读全文>>

日期：2020-04-21 The earth-worm is also called the dew-worm, because it likes to come out of its hole and creep about when the grass is wet with dew. It is a very long and thin animal, being often a foot long, yet less than one-quarter of an inch in thickness. 蚯蚓... 阅读全文>>

日期：2020-04-20 We use this every day as a stand-in for love and the human heart, but it doesnt really look like the real thing. 我们每天都用这个符号代表爱以及人类的心脏，但这符号和真正心脏的模样其实有点差距。 Zachary Crockett at Priceonomics has looked into the hi... 阅读全文>>

日期：2020-04-14 每个孩子都喜欢喝鲜牛奶。那香浓的味道，甜美的滋味是多么诱人！对于这样一种极为有用的饮品，你肯定想要了解更多吧? 我们喝的牛奶几乎全部来自奶牛的乳房。不过，人们还饮用其他动物的奶，例如羊、驴以及骆驼。 Every child likes to drink new milk. How pleasant it... 阅读全文>>

日期：2020-04-14 假如你买了一些塑料制品，上面标明可生物降解。那你就可以放心了，因为你知道将它扔掉后它会无害降解。嗯，不要太快下结论。 当我们从适合垃圾填埋场的特性这一角度考虑生物降解能力时，会发现它并不是理想的材料属性。原因是，我们在设计生物降解能力时，通常会追求快... 阅读全文>>

日期：2020-04-13 研究人员认为，他们已揭开了狗狗鼻子周围的秘密，解释了为什么狗狗们的鼻子如此冰凉。 Researchers believe they have solved one of sciences greatest mysteries. They think they have found out why a dogs nose is cold. Scientists from universities in Sweden... 阅读全文>>

日期：2020-04-13 Snakes are elongated, legless, carnivorous reptiles that can be distinguished from legless lizards by their lack of eyelids and external ears. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to... 阅读全文>>

日期：2020-04-08 Elephants are large mammals of the family Elephantidae and the order Proboscidea. Traditionally, two species are recognized, the African elephant and the Asian elephant, although some evidence suggests that African bush elephants and African forest... 阅读全文>>

日期：2020-04-08 The oak is one of the finest and most useful of all our forest trees. 在所有森林树种之中, 橡树是最为优良、最为有用的一种树木。 Its height sometimes exceeds sixty feet, while the girth, or distance round the trunk, is often more than twenty feet. 它... 阅读全文>>