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科学为什么·英语30篇（1）

共 30 篇 · 文字目录 · 前 3 篇可试读

  1. 1 Why Do Rainbows Always Appear Opposite the Sun? 为什么彩虹总出现在太阳对面？
  2. 2 Why Do Some Trees Keep Their Leaves All Winter? 为什么有些树整个冬天都长着叶子？
  3. 3 Why Does Ice Float on Water? 为什么冰能浮在水面上？
  4. 4 Why Do We See Mirages on Hot Roads? 为什么炎热路面上会出现海市蜃楼？ 需解锁
  5. 5 Why Do Volcanoes Erupt After Long Quiet Periods? 为什么火山会在长期沉寂后突然喷发？ 需解锁
  6. 6 Why Do Some Animals Hibernate While Others Migrate? 为什么有些动物冬眠而另一些迁徙？ 需解锁
  7. 7 Why Do Stars Twinkle But Planets Usually Don’t? 为什么星星会闪烁而行星通常不会？ 需解锁
  8. 8 Why Do Our Fingernails Grow Faster Than Toenails? 为什么指甲比脚趾甲长得快？ 需解锁
  9. 9 Why Do Some Clouds Look Like Cotton Balls While Others Are Flat and Gray? 为什么有些云像棉球而另一些又扁又灰？ 需解锁
  10. 10 Why Do Fireflies Glow Without Getting Hot? 为什么萤火虫发光却不发热？ 需解锁
  11. 11 Why Do Mountains Affect Weather Patterns So Strongly? 为什么山脉对天气模式影响这么大？ 需解锁
  12. 12 Why Do Ocean Currents Flow in Giant Circular Patterns? 为什么洋流会形成巨大的环形流动？ 需解锁
  13. 13 Why Do Certain Rocks Glow Under Ultraviolet Light? 为什么某些岩石在紫外线下会发光？ 需解锁
  14. 14 Why Do Deserts Have So Many Sand Dunes of Different Shapes? 为什么沙漠中有形状各异的沙丘？ 需解锁
  15. 15 Why Do Some Insects Walk on Water While Others Sink Immediately? 为什么有些昆虫能在水面行走，而另一些却立刻下沉？ 需解锁
  16. 16 Why Do Lightning Strikes Often Hit Tall Objects—but Not Always? 为什么闪电常击中高处物体，却又并非总是如此？ 需解锁
  17. 17 Why Do Glaciers Move Even Though Ice Seems Solid and Still? 为什么冰川会移动，尽管冰看起来坚固静止？ 需解锁
  18. 18 Why Do Certain Flowers Change Color After Being Pollinated? 为什么某些花朵授粉后会变色？ 需解锁
  19. 19 Why Do Some Lakes Change Color With the Seasons? 为什么有些湖泊会随季节改变颜色？ 需解锁
  20. 20 Why Do Certain Cacti Bloom Only Once Every Several Years? 为什么某些仙人掌要隔好几年才开花一次？ 需解锁
  21. 21 Why Do Some Butterflies Migrate Across Entire Continents? 为什么一些蝴蝶能跨越整个大陆迁徙？ 需解锁
  22. 22 Why Do Deep-Sea Creatures Glow in Different Colors? 为什么深海生物会发出不同颜色的光？ 需解锁
  23. 23 Why Do Some Trees Produce 'Ghost Leaves' After Autumn? 为什么有些树在秋天后还会留下‘幽灵叶片’？ 需解锁
  24. 24 Why Do Some Rivers Carve Meanders That Seem to Defy Gravity? 为什么有些河流会形成看似违背重力的蜿蜒河道？ 需解锁
  25. 25 Why Do Some Snowflakes Form Perfect Hexagons While Others Look Irregular? 为什么有些雪花呈完美的六边形，而另一些却形状不规则？ 需解锁
  26. 26 Why Do Certain Clams Produce Pearls Only After a Grain of Sand Enters Their Shell? 为什么某些蚌类仅在沙粒进入壳内后才产珍珠？ 需解锁
  27. 27 Why Do Some Volcanic Ash Clouds Travel Thousands of Kilometers Without Settling? 为什么某些火山灰云能飘行数千公里而不沉降？ 需解锁
  28. 28 Why Do Certain Fungi Glow Softly in the Dark Forest Floor? 为什么某些真菌会在幽暗的森林地表发出微光？ 需解锁
  29. 29 Why Do Some Coral Reefs Grow Only in Clear, Shallow Tropical Waters? 为什么某些珊瑚礁只生长在清澈、温暖、浅层的热带水域？ 需解锁
  30. 30 Why Do Certain Moths Navigate Using Moonlight—And Get Confused by Streetlamps? 为什么某些蛾类利用月光导航，却会被路灯迷惑？ 需解锁