Because of this comets are often called 'dirty snowballs.'

由此，彗星常被称为“肮脏的雪球”。

" It is the boy who threw the snowball, " said my father.

“就是那掷雪球的孩子。” 父亲说。

If you take a snowball and heat it up, it'll melt.

如果你把雪球加热，它就会融化。

Have you ever tried to make a snowball but it wouldn't stay together?

你有没有试过捏雪球，但是就是捏不出？

Whack! went the snowball against the door; and the boys took to their heels.

“砰”的声，击即中！雪球砸在门上。那两个男孩马上溜之大吉。

So this highlights the opportunity for a virtuous cycle where the effect can snowball.

因此，这突显了良性循环的机会，在这种循环中，影响可能会像滚雪球样越来越大。

When Rowley came over, we started rolling the first snowball to make the base.

到，我们便开始滚第个雪球，做底下的大球。

I do not think it right to throw the snowball.

我认为扔这个球是不对的。

In other words, stop the snowball from rolling.

换句话说，就是阻止雪球滚动。

Because a comet is this dirty snowball of not only rock, but rock mixed with ice.

因为颗彗星实际上就是些冰雪物质和尘埃混杂在起的脏雪球。

And then it just snowballs from there.

然后情况会像滚雪球样愈演愈烈。

Number eight is throwing snowballs, as a kid growing up in Canada, snowball fights were super common.

第八条是扔雪球。作为在加拿大长大的孩子，打雪仗是非常常见的。

Snowballs were thrown at the British.

雪球直接砸在英国人身上。

From there, things would snowball fast.

从那开始，事情会迅速地滚雪球般发展。

Er, your tennis snowball came back.

你的网球雪球回来了。

We throw snowballs at each other, screaming and laughing.

我们互相扔雪球，叫着，笑着。

Of course, they're having a ball, but does hurling a snowball at a religious leader make you cold-hearted?

当然，他们有个球，但是，向宗教领袖扔雪球会让你变得冷酷无情吗?

So it's just going to sort of snowball.

这就像滚雪球样。

In Tacoma, several hundred residents organized a mass snowball fight.

在塔科马，数百民众组织打大型雪仗。

Just as you'll never find a snowball in hell because hell is meant to be a hot place.

就好像你不可能在地狱里找到雪球，因为那里太热了。