探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流.用英语怎么说？

探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流.

The explorers were confronted with gorges ( that were ) almost impassable and rivers ( that were ) often unfordable.

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。

explorers

n. 探险家，勘探者( explorer的名词复数 )；

例句
Portuguese explorers had charted the west coast of Africa as far as Sierra Leone...
葡萄牙探险家已经绘制出了远至塞拉里昂的非洲西海岸地图。

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。

confronted

v. 面对( confront的过去式和过去分词 )，使面对，使对质，处理；

例句
She was confronted with severe money problems...
她面临严峻的资金问题。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

gorges

n. 山峡，峡谷( gorge的名词复数 )，咽喉；v. （用食物把自己）塞饱，填饱( gorge的第三人称单数 )，作呕；

例句
The explorers were confronted with gorges ( that were ) almost impassable and rivers ( that were ) often unfordable.
探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流.

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

almost

adv. 几乎，差不多，将近，快要，近乎；

例句
Despite considerable pain she has been getting out and about almost as normal...
尽管还很痛，她已经基本上行动如常。

impassable

adj. 不能通行的，无法通过，不可逾越；

例句
The avenue had never been paved, and deep mud made it impassable in winter.
这条大街从未铺过路面，冬天泥泞不堪，无法通行。

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。

rivers

n. 河，江( river的名词复数 )，河流，水流，江河；

例句
The 160-metre falls mark the dramatic confluence of the rivers Nera and Velino.
内拉河和韦利诺河的汇合处是落差达160米的瀑布，景象十分壮观。

often

adv. 常常，经常，时常，再三；

例句
Genetic abnormalities are more often associated with faults in paternal DNA than in maternal DNA.
相对于母本DNA,基因畸变往往更多地与父本DNA上的缺陷相关。