国家地理 龙卷风来袭大难不死

A tornado¹ rips across the Missouri Plains. Winds over 150 miles per hour shred² everything in the twister's path.

龙卷风在密苏里平原肆虐横行。风速高达每小时150英里，撕碎了前进路上的一切障碍。

When it smashes a trailer home, one man is sucked into the heart of the storm, spun³ and shaken horrifically.

当它打道回府的时候，一名男子被吸进风眼，恐怖地旋转摇摆。

His limp body drops out of the sky a quarter of a mile away.

他软弱的身体最终从1.25英里的高空落下。

"It was crazy. I knew that I wasn't where I supposed to be, and it took me a minute to realize, you know, what was happening."

“简直太疯狂了。我知道我应该在哪里。你知道，我用了一分钟的时间才明白发生了什么事。”

Matt hasn't broken a single bone. How could that be? Scientists estimate Matt hit the ground traveling at least 30 miles an hour.

Matt毫发未损。为什么会这样呢？科学家估计Matt落到地面时的速度至少每小时30英里。

Yet his bones protected his internal organs from being smashed.

但是他的骨头保护他的内脏器官免收损害。

"Lock the door." "Got it."

“锁门。” “收到。”

Our skeleton is made up of 206 bones, from the largest in our legs and arms to the tiny bones in our toes and fingers.

我们的骨架由206块骨骼组成，从四肢的最大的骨骼到手指脚趾的细小的骨头，

They give us the tough flexible frame that lets us push and pull on our will.

组成了我们坚硬有弹性的框架，使我们可以伸缩自如。

Bone is incredibly strong.

骨骼坚硬的不可思议。

Pound for pound, bone is stronger than concrete. It has a strength-to-weight ratio found in no other natural material on earth.

均等重量下，骨头比水泥还坚硬。它有这很高的力量重量比率，地球上的其他物质都没有发现。

The secret of bone's strength and lightness lies inside. It is a matrix of hollow cells; its walls are as thin as paper.

骨头的力量大，重量却很轻，秘密在于骨头里面。它是由一系列空细胞组成的，细胞壁像纸一样薄。

Bone gets its rigidity⁴ from calcium⁵ and phosphorus, materials found in seashells and teeth.

骨骼坚硬是由于钙和磷，这些物质同样存在于贝壳和牙齿中。

But astonishingly, almost half of our bone mass is soft and alive, allowing our bones to bend.

但是令人惊讶的是，我们骨骼中几乎一半的物质是柔软的，活动，可以使我们的骨骼弯曲。

Every seven years, a healthy human body completely replaces every single bone cell.

每七年，健康的人体的骨骼细胞会更新一遍。

This renewal⁶ keeps our bones incredibly strong and uniquely adaptable⁷.

这种更新使我们的骨骼异常坚硬，适应性奇强。

1 tornado   

n.飓风，龙卷风

参考例句：

• A tornado whirled into the town last week.龙卷风上周袭击了这座城市。
• The approaching tornado struck awe in our hearts.正在逼近的龙卷风使我们惊恐万分。

2 shred   

v.撕成碎片，变成碎片；n.碎布条，细片，些少

参考例句：

• There is not a shred of truth in what he says.他说的全是骗人的鬼话。
• The food processor can shred all kinds of vegetables.这架食品加工机可将各种蔬菜切丝切条。

3 spun   

v.纺，杜撰，急转身

参考例句：

• His grandmother spun him a yarn at the fire.他奶奶在火炉边给他讲故事。
• Her skilful fingers spun the wool out to a fine thread.她那灵巧的手指把羊毛纺成了细毛线。

4 rigidity   

adj.钢性，坚硬

参考例句：

• The rigidity of the metal caused it to crack.这金属因刚度强而产生裂纹。
• He deplored the rigidity of her views.他痛感她的观点僵化。

5 calcium   

n.钙(化学符号Ca)

参考例句：

• We need calcium to make bones.我们需要钙来壮骨。
• Calcium is found most abundantly in milk.奶含钙最丰富。

6 renewal   

adj.(契约)延期，续订，更新，复活，重来

参考例句：

• Her contract is coming up for renewal in the autumn.她的合同秋天就应该续签了。
• Easter eggs symbolize the renewal of life.复活蛋象征新生。

7 adaptable   

adj.能适应的，适应性强的，可改编的

参考例句：

• He is an adaptable man and will soon learn the new work.他是个适应性很强的人，很快就将学会这种工作。
• The soil is adaptable to the growth of peanuts.这土壤适宜于花生的生长。