Boston ivies crawl along the wall.是什么意思？

Boston ivies crawl along the wall.

爬山虎在墙上蔓延.

Boston

n. 波士顿（美国马萨诸塞州首府）；

例句
The Boston Museum of Fine Arts has already contracted to lease part of its collection to a museum in Japan.
波士顿美术博物馆已经签订合同，将其部分藏品租借给日本一家博物馆。

ivies

n. <植>常春藤( ivy的名词复数 )；

例句
This is was green at a time when other ivies had pooped out.
这株常春藤在其他常春藤已凋谢时依然青翠.

crawl

vi. 爬行，缓慢行进，巴结；n. 缓慢的爬行，〈美俚〉跳舞，自由式游泳，养鱼（龟）池；

例句
Don't worry if your baby seems a little reluctant to crawl or walk...
如果你的宝宝不爱爬也不爱走，不要担心。

along

adv. 一起，向前，进展，到某处；prep. 沿着，顺着，靠着…边；

例句
The helicopter can zip along at about 150 kilometres an hour.
该直升机能以每小时150公里左右的速度疾进。

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。

wall

n. 墙，屏障，隔阂，壁垒；vt.& vi. 筑墙围住，用墙隔开，围以墙；adj. 墙壁的；

例句
On a table pushed against a wall there were bottles of beer and wine.
在一张靠墙的餐桌上有啤酒和葡萄酒。