为什么地铁停车时门总能对那么准？
How do subway trains always arrive on time?6 views
万元乳胶床垫是怎么制作出来的？凭什么卖那么贵
How are latex mattresses built? Why are they so expensive?2 views 1
德国人是如何拆除冷却塔的？在162米高安装挖掘机？实拍爆破现场
How did they demolish this cooling tower in Germany?1 view
剃须刀片是怎样制造的？先高温火烤后冰镇，锋利无比的秘密就在这
Who are razors made?2 views
荷兰人为什么要在河下面修一条公路？
Why do they build underwater roads in the Netherlands?2 views
什么是鱼梯？为了帮助鱼类越过大坝，工程师想出了一个妙招
What are fish stairs?1 view
为什么盖房时要在钢筋上加一排小圆环？
What are the rings in rebar used for?
一朵云重达500吨，相当于近百头大象，可它为什么不会掉下来？
Clouds weigh 500 tons, why don't they fall down?3 views 1
千斤顶的力量是从哪来的？它是如何顶起百吨重物的？内部构造亮了！
What makes jack lifts so strong?4 views
甘蔗是怎么制成白糖的？它和甜菜制成的糖谁更甜？实拍制糖全过程
How is sugar made from sugar cane?1 view
一趟火车上千名乘客，为何连十几份盒饭也卖不完？只是因为太贵？
Why don't more people buy food on trains?2 views
为什么玻璃厂一年365天都不能停止生产？停下就报废？长见识了！
Why can't glass factories stop working for a day?2 views 1
客机长途飞行时，机组人员是怎么睡觉的？揭秘飞机上隐秘的地方
How does the flight crew sleep on long-distance flights?
为何珠峰上的遗体没人收尸？最著名的一具尸体，躺了15年无人掩埋
Why aren't dead bodies removed from Mount Everest?2 views
肉做的抹香鲸能下潜3000米，为什么钢铁之躯的潜艇，却做不到？
How can a sperm whale withstand water pressure that a steel submarine can't?1 view
高压水切割技术有多厉害？用钢铁测试，难得一见的现象发生了
How powerful is high-pressure water?
明明有空闲廊桥，为什么上飞机还要坐摆渡车？只因购买特价机票？
Why do you have to get in a bus to board an airplane?
氦气的用途你真的知道吗？为什么氦气无毒无害却能取人性命？
What is helium useful for?
飞在万米高空的战斗机该如何取暖？空调不制热反制冷？这是为何呢？
How is the temperature controlled inside of fighter jets?1 view
为什么汽车在转弯后，方向盘会自动回正？
Why do steering wheels move by themselves after turning?
水银能“吃掉”黄金？为什么古人还用它来炼金？揭开神秘的炼金术
Can mercury eat away gold?
什么是爆炸成型？一声巨响锥形铁罐变圆球？爆炸成形的原理是什么？
How can you shape things through explosions?
珍珠是怎样形成的？都是从蚌里产生的吗？蚌里的珍珠又是怎样形成的
How do pearls form?
起步就要500万的劳斯莱斯，凭什么卖这么贵？不愧是汽车界的天花板!
What makes Rolls Royce cars so expensive?
上千吨的煤炭如何从火车上卸下来的？实拍卸煤全程，大型翻车现场？
How do you unload tons of coal from a train?2 views