The girls were afraid of snakes and picked their way along with extreme caution...是什么意思？

The girls were afraid of snakes and picked their way along with extreme caution...

女孩们害怕蛇，于是谨小慎微地择路而行。

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。

girls

n. 女儿( girl的名词复数 )，女孩，女工，（男人的）女朋友；

例句
'When I was an adolescent,' says a thirty-one-year-old man, 'I thought girls held all the aces.'
“当我还是个毛头小伙儿时，”一个31岁的男人说，“我觉得完全是女孩子说了算。”

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。

afraid

adj. 害怕的，担心的，恐怕，畏惧，害怕；

例句
I am afraid the court may not adjourn until three or even later.
我担心法庭要到3点或更晚时才会休庭。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

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

snakes

n. 蛇( snake的名词复数 )，奸险的人，卑劣的人，蛇形浮动汇率制；

例句
The girls were afraid of snakes and picked their way along with extreme caution.
女孩子们害怕蛇，走路时格外小心。

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。

picked

adj. 精选的，摘下的；v. 采( pick的过去式和过去分词 )，摘，啄，

例句
He picked up the sheets of paper, and balled them tightly in his fists...
他抓起那几张纸，在手里紧紧攥成团。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

way

n. 道路，方法，方向，某方面；adv. 远远地，大大地；

例句
The way that American history is taught may change in order to accommodate some more of those cultures.
美国历史的授课方式可能会为了照顾到更多的文化而作改变。

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。

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。

extreme

adj. 极端的，过激的，极限的，非常的，末端的，（政治上）急进的；n. 极端，困境，[数]极限值，[常用复数]在两末端的事物；

例句
The incident has triggered fresh arguments about the role of the extreme right in France...
该事件引发了关于极右翼势力在法国所起作用的新一轮讨论。

caution

n. 小心，警告，〈英〉担保，〈口〉须警惕的事或人；vt. 警告，提醒；

例句
Extreme caution should be exercised when buying part-worn tyres...
购买部分磨损轮胎时要格外当心。