英文歌曲中的“blowin'wind”是什么意思？

这是BOB DYLAN的一首老歌“Blowing in the Wind 随风飘逝”

完整的中英文歌词是：

How many roads must a man walk down

一个人要走过多少路

Before you call him a man

才可以称之为人

How many seas must a white dove sail

一只白鸽要飞穿越多少海洋

Before she sleeps in the sand

才能在沙滩上栖息

How many times must the cannonballs fly

炮弹要飞行多少次

Before they are forever banned

才会永远被禁止

The answer, my friend, is blowing in the wind

我的朋友

The answer is blowing in the wind

答案就飘荡在风中

How many years can a mountain exist

一座山要屹立多久

Before it is washed to the sea

才会被沧海淹没

How many years can some people exist

一个民族要生存多久

Before they're allowed to be free

才会获得自由

How many times can a man turn his head

一个人要转过多少次头

And pretend that he just doesn't see 来假装他什么都没看见

The answer, my friend, is blowing in the wind 我的朋友

The answer is blowing in the wind

答案就飘荡在风中

How many times must a man look up

一个人要抬多少次头

Before he can see the sky

才可以看清天空

How many ears must one man have

一个人要长多少只耳朵

Before he can hear people cry

才能听到人们的哭泣

How many deaths will it take till he knows

要经历多少次死亡他才会知道

That too many people have died

太多的人已经付出了生命

The answer, my friend, is blowing in the wind

我的朋友

The answer is blowing in the wind

答案就飘荡在风中