To think that humans will be walking on Mars in 20 years is completely reasonable.

认为人类将在20年内在火星上行走是完全合理的。

You were walking on air, created this upward spiral as a result.

会有一种飘起来的感觉，形成一个良性循环。

Imagine walking through a park in Belgium on the hunt for hidden trolls.

正穿梭于比利时公园搜寻藏身的巨魔。

So, believe it or not, they're walking on air.

所无论是否相信，他们都在御风而行。

That night, walking on Ostula's beach, I waited for turtles to swim ashore to nest.

那晚，我在奥斯图拉的海滩上走，待海龟游上岸来产卵。

Once upon a time a Wolf was walking toward a spring on a hillside.

从前，有一只狼正朝着山坡上的泉水走去。

By walking on a regular basis, you may look and feel better than ever.

定期行走，的状态和自我感觉会空前良好。

So you know nobody walking on the sidewalks, nobody going up and down the street.

所知道没有人在人行道上行走，没有人在街上出行。

Think about the sidewalks we're walking on.

我们走过的人行道。

Pyongyang responded by walking out on a 1994 denuclearization deal.

朝鲜的回应是退出1994年签署的弃核协议。

When I'm walking on the street, sometimes people run into me.

当我走在街上时，有时人们会撞到我。

You hear... You see people walking on the street talking to each other.

那里的人们在路上遇到都会互相聊天。

Lots of people walking on the streets, so it can be tough to get around.

街上也有很多行人，所在附近走动很困难。

It's a bear walking on its hind legs.

这是熊直立走路留下的。

She's she's walking a cat on a leash.

拿狗链栓了个猫在散步。

When I reached the highway I turned north, walking on the gravel shoulder, against traffic.

上了大路我朝北走，逆着车辆行驶方向走在沙石的路肩上。

I am walking on pins and needles.

我会格外小心，不惹生气。

For example, " People are walking on the bridge" .

例如，“人们正在桥上走。”

I was walking on a cloud for weeks after that. I still am.

在这件事之后的几周，我有些飘飘然的感觉… 不过我还是原来那个自己。

And that's thanks to our unique (and very useful) habit of walking on two legs.

这要归功于我们独特的（非常有用的）两条腿走路的习惯。