The Bloated Look of the Starving 饥饿性水肿，脂肪和肌肉丢失而使细胞外液体增多,组织张力降低,皮肤失去弹性。快要饿死的人，都是肚子大大的。 Its one of the most painful aspects of starvation to witness: th

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英语听力文摘 English Digest

英语听力文摘 English Digest 280、飞盘为何会飞？

Why Frisbees Fly With a gentle flick of the wrist on a warm summer day, you can launch a frisbee on a long and graceful flight. Why do they fly so well? One reason is something called gyroscopic force. This is the tendency of a spinning object to mai

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英语听力文摘 English Digest

英语听力文摘 English Digest 279、米诺鱼的自杀式生存策略

For Minnows, A Suicidal Survival Strategy 北美多种小型鱼类，特别是鲤科(Cyprinidae)鱼类的总称。亦指荫鱼科(Umbridae)和鱂科(Cyprinodontidae)鱼类，minnow一词又泛指许多大型鱼类的幼鱼。北美的鲤科米诺鱼包

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英语听力文摘 English Digest

英语听力文摘 English Digest 278、形态各异的狗

Mans Best Friendin All Shapes and Sizes Scientists are making great strides in understanding the genes that allow such a wide range of shapes, sizes and personalities in different dog breeds. Did you know domestic dogs were bred from wolves about 15,

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英语听力文摘 English Digest

英语听力文摘 English Digest 277、孔隙

Sugar bowls and hole 孔隙是岩土固体矿物颗粒间的空间。岩土中直径大于1毫米、重力水可于其中自由运动的孔隙，是大孔隙（macro-pore，large pore）。岩土中直径为0.01～1毫米、重力水和毛管水可存其

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英语听力文摘 English Digest

英语听力文摘 English Digest 276、飞机的凝迹

Airplane Contrails Have you ever seen a perfectly cloudless sky? Cloudlessthat isexcept for two or three long white lines smeared across the perfect blue sky by airplanes like smudges on a pane of glass. Why do airplanes sometimes leave contrails beh

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英语听力文摘 English Digest

英语听力文摘 English Digest 275、类地行星发现者

Terrestrial Planet Finder 瑞士科学家米歇尔梅耶带领欧洲科学家小组宣布发现了一颗新的可能适宜人类居住的星球，现在，他又制定了更大的目标：寻找地外生命的迹象。该发现小组的成员斯蒂凡尤

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英语听力文摘 English Digest

英语听力文摘 English Digest 274、天然扩音器

Megaphones If you want to call to a friend half a block down a crowded street, you might cup your hands around your mouth to better aim your voice. Have you ever wondered why simple megaphonesamplify your voice so well? Actually, they work for two di

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英语听力文摘 English Digest

英语听力文摘 English Digest 273、令人烦恼的青春痘

Zits Versus Hairy Faces 痤疮是发生在毛囊皮脂腺的慢性皮肤病，发生的因素多种多样，但最直接的因素就是毛孔堵塞。毛孔堵塞以后，毛囊里面的油脂排不出来，越积越多就形成一个个小痘痘，青

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英语听力文摘 English Digest

英语听力文摘 English Digest 272、测谎仪

Lying to a Machine 不说谎的人觉得它很神秘，说谎的人觉得它很可怕，这就是神奇的测谎仪。面对不断攀升的犯罪，善良的人们总是期望借助科学的灵丹妙药，将所有犯罪分子手到擒来。测谎技术

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英语听力文摘 English Digest

英语听力文摘 English Digest 286、变性的青蛙

Gender-Jumping Toads 美国研究人员说，常用除草剂阿特拉津会令雄蛙变性为雌蛙。美国加利福尼亚大学伯克利分校研究人员把40只雄性非洲爪蛙放入阿特拉津浓度为10亿分之2.5的水中，发现90%雌性化

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英语听力文摘 English Digest

【有声英语文学名著】安娜卡列宁娜（89）

EIGHTY-NINE Chapter 13 LEVIN remembered a recent scene between Dolly and her children. Left by themselves, the children had started cooking raspberries over a candle, and pouring jets of milk into their mouths. When their mother caught them at this p

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有声英语文学名著

【有声英语文学名著】安娜卡列宁娜（86）

EIGHTY-SIX That review was followed by dead silence both in print and in conversation concerning the book, and Koznyshev saw that his six years work, carried out with so much devotion and labour, was entirely thrown away. His position was the more pa

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有声英语文学名著