1.against the advance of 阻碍发展
例句：It is a barrier against the advance of civilization
它一直是文化发展的障碍

2.dash through 奔腾
例句：We made a dash through the rain to the bus.
我们冒雨向公共汽车猛奔过去。

3.A band of 一队
例句：Tom Sawyer hunted me up and said he was going to start a band of robbers.
汤姆·索亚又把我找到了，说他要组织一个强盗帮。

4.clumps of 一片片
例句：Elephants also use their trunks to yank up clumps of grasses and shove the greenery into their mouths.
大象也会用鼻子拉起丛生的杂草，把草堆进嘴里。