北单比分直播即时 www.609631.live 日期:2020-04-14 每個孩子都喜歡喝鮮牛奶。那香濃的味道,甜美的滋味是多么誘人!對于這樣一種極為有用的飲品,你肯定想要了解更多吧? 我們喝的牛奶幾乎全部來自奶牛的乳房。不過,人們還飲用其他動物的奶,例如羊、驢以及駱駝。 Every child likes to drink new milk. How pleasant it... 閱讀全文>>

日期:2020-04-14 假如你買了一些塑料制品,上面標明可生物降解。那你就可以放心了,因為你知道將它扔掉后它會無害降解。嗯,不要太快下結論。 當我們從適合垃圾填埋場的特性這一角度考慮生物降解能力時,會發現它并不是理想的材料屬性。原因是,我們在設計生物降解能力時,通?;嶙非罌?.. 閱讀全文>>

日期:2020-04-13 研究人員認為,他們已揭開了狗狗鼻子周圍的秘密,解釋了為什么狗狗們的鼻子如此冰涼。 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... 閱讀全文>>

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... 閱讀全文>>

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... 閱讀全文>>

日期:2020-04-08 The oak is one of the finest and most useful of all our forest trees. 在所有森林樹種之中, 橡樹是最為優良、最為有用的一種樹木。 Its height sometimes exceeds sixty feet, while the girth, or distance round the trunk, is often more than twenty feet. 它... 閱讀全文>>

日期:2020-04-08 Women who give birth may be biologically older than women who dont, a new study suggests. 一項新研究發現,生過孩子的女性在生理上會比那些沒有生過的更老。 For the study, the researchers analyzed information from 1,556 US women ages 20 to 44 who took p... 閱讀全文>>

日期:2020-04-07 Each of us drinks about three pints of fresh water every day, and we use a great deal of water for washing, for cooking, and for other purposes. Where does all this water come from? In some places we get water from wells, and in other places from ri... 閱讀全文>>

日期:2020-04-07 Children who are fond of country walks, and who use their eyes well, 喜歡在鄉村漫步并且善于觀察的孩子們 will be sure to notice in early spring little lumps of jelly floating on some pond by the roadside. 一定在早春時分看到過這樣的場景:路邊的池塘中... 閱讀全文>>

日期:2020-04-07 Where did the flour come from, and how was it made? 面粉從何而來? 又是如何制成的呢? There are several kinds of floursuch as oat-flour, barley-flour, rice-flour, and maize-flour or corn-flour. 面粉的種類有很多, 例如燕麥粉、大麥粉、米粉、玉米粉。 But... 閱讀全文>>

日期:2020-03-31 Turtles have an unfortunate habit of devouring plastic objects floating in the sea. 海龜有一個壞習慣,就是吞食漂浮在海里的塑料制品。 These then get snared in their alimentary canals, cannot be broken down by the animals digestive enzymes and may ult... 閱讀全文>>

日期:2020-03-26 海豚在很多方面都和人類很像。比如說海豚有和人類很像的特殊的呼吸系統,唯一的不同是海豚能不呼吸氧氣在水下呆很長時間。但是海豚使如何做到睡覺不溺水呢? Since Dolphins are like human being in so many ways. For example, dolphins have a special respiratory... 閱讀全文>>

日期:2020-03-26 Sugar On The Brain 大腦中的糖 Its long been understood that there is a connection between memory problems and diabetes, a disorder characterized by excessively high blood sugar. Sugar provides the body with fuel for various processes, including memo... 閱讀全文>>

日期:2020-03-26 Spectacular Inventions 眼鏡的發明 When you think about inventions that have radically changed human existence, what comes to mind? Probably the wheel, the printing press, maybe the refrigerator and definitely personal computers. Then there are those... 閱讀全文>>

日期:2020-03-26 煮一杯咖啡并不難。但一項新的研究表明,擁有數學和分析化學背景對煮咖啡并沒有壞處。因為研究人員將他們在材料科學和建模方面的技能應用到煮意式濃縮咖啡上,有了一個突破性的發現:與人們普遍認為的相反,用更少的豆子和更粗糙的研磨會讓你得到更好的效果。他們的研究... 閱讀全文>>

日期:2020-03-25 No other country in Europe has as many volcanoes as Italy. This is because the Italian peninsula stands on a fault line. Three major volcanoes (Etna, Stromboli, and Vesuvius) have erupted in the last hundred years. 歐洲沒有其他國家擁有比意大利更多的... 閱讀全文>>

日期:2020-03-25 海豚被認為是地球上最聰明的動物之一。 Dolphins are often regarded as one of Earths most intelligent animals. They are social creatures, living in pods of up to a dozen individuals. In places with a high abundance of food, pods can merge temporarily,... 閱讀全文>>

日期:2020-03-23 When it comes to physical health, mountains of evidence will tell you that a healthy diet is important. 談到身體健康時,大量證據會告訴你健康飲食很重要。 And it is. 而且確實是這樣的。 But a growing body of research is showing that diet is important f... 閱讀全文>>

日期:2020-03-19 Dolphins are marine mammals closely related to whales and porpoises. The name is originally from Greek (delphus), meaning womb. The animals name can therefore be interpreted as meaning a fish with a womb. Along with whales and porpoises, dolphins ar... 閱讀全文>>

日期:2020-03-18 很多人都分不清tortoise和turtle。 Many people are confused by the words tortoise and turtle. This is partly due to regional differences. In British English, turtles and tortoises are two different hard-shelled, egg-laying reptiles. The main difference... 閱讀全文>>

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