We looked for him together in the snow, but all we found was a small black hat.

我们一起在雪地里找他，但只找到了一顶小黑帽。

One day, we were leaving the hotel when I saw a boy with a black hat on in the street.

一天，我们离开酒店时，我在街上看到一个戴黑帽子的男孩。

The hombre wore a black hat and a long coat.

那个男人戴着一顶黑帽子，穿着一件长外套。

Black hat, what does that mean?

黑帽，是什么意思？

Conversely, black-hat hackers hack for dishonest reasons;

相反，黑帽黑客攻击，则是非法行为；

For now there are white hat and black hat optimizing the points.

对于现在的优化有白帽和黑帽之分。

Are doing SEO, black hat and white hat why the sub?

都是做SEO，为什么有黑帽和白帽之分？

He often interchanges his black hat with his grey hat.

他经常将他的黑帽子与他的灰帽子交换着戴.

He wears a black hat upon his head.

他头上常戴著一顶黑帽子。

Search engine to stop this practice, so this practice is called black hat.

搜索引擎要制止这个做法，所以这个做法就被称为黑帽。