The knee-length dresses were unflattering and ugly.是什么意思？

The knee-length dresses were unflattering and ugly.

齐膝长裙既不显身材又不好看。

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。

dresses

n. 衣服( dress的名词复数 )，装饰，连衣裙，礼服；

例句
The pair were christened 'The Women in Black' after they both wore black dresses at a party.
那两人在一次聚会上都穿了黑裙子，从此就被叫做“黑衣姐妹花”。

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。

unflattering

adj. 不讨好人的，不奉承人的；

例句
He depicted the town's respectable families in an unflattering light...
他在描述镇上体面人家时满是贬抑之词。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

ugly

adj. 难看的，丑陋的，有敌意的，不祥的；n. 丑陋的人（东西）；

例句
An ugly shopping centre stands across from one of the few buildings with character.
一座难看的购物中心对面，耸立着为数不多的几幢别具特色的大楼之一。