The mountains were shadowing into blackness.是什么意思？

The mountains were shadowing into blackness.

群山渐渐消失在黑暗中。

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。

mountains

n. 山，山岳( mountain的名词复数 )，山脉，群山；

例句
In his dreams, the mountains assumed enormous importance.
在他的梦中，山有着至关重要的作用。

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。

shadowing

遮蔽，荫蔽；

例句
There he stood: hair in wild tangles, dark stubble shadowing his chin.
他站在那儿，头发乱成一团，下巴上一片黑胡茬。

into

prep. （表示方向）进入…中，（表示所属）输入，（表示状态）进入…状态，（表示时间）持续到；

例句
By 1838, the abolitionists had shamed parliament into ending slavery in British colonies...
到1838年，废奴主义者迫使议会出于道德压力而废除了英国殖民地的奴隶制。

blackness

n. 黑色，黑人民族性，阴郁，邪恶；

例句
...the bleak mountains that loomed out of the blackness and towered around us.
黑暗中若隐若现、耸立在我们四周的荒山