Unfortunately the portraits were frauds.是什么意思？

Unfortunately the portraits were frauds.

不幸的是这些肖像都是骗人的。

unfortunately

adv. 不幸地，遗憾地，可惜，不巧；

例句
This man may have killed others but unfortunately we have no firm evidence...
这名男子可能还杀害过其他人，只可惜我们没有确凿的证据。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

portraits

n. 肖像，画像( portrait的名词复数 )，生动的描写；

例句
...the ancestral portraits in the hallway.
走廊里祖先的画像

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

frauds

n. 欺诈( fraud的名词复数 )，骗子，伪劣品，冒牌货；

例句
Tax frauds are dealt with by the Inland Revenue.
税务欺诈由国内税务局负责处理。