第31句：

Frustrated by these restrictions,Subra left her job in 1981,created her own company,and has devoted the past two decades to helping people fight back against giant industrial polluters.

六级词汇讲解:
frustrate意为“使沮丧，使挫败”。devote...to doing sth.意为“把……用于做某事，致力于做某事”。fight back against意为“奋力抵抗，还击”，其后的宾语即为抵抗的对象，同时也往往是听音的重点。也可以只说fight back，表示“还击，抵抗;抑制”。如:
1) Victims of discrimination often don't have the power to f ght back。
歧视现象的受害者通常无力还击。
2 ) She fought back her disgust.
她强忍住心里的厌恶。
polluter意为“污染源，污染者”。

六级考点归纳:
与fight有关的常见短语还有:
1. fight sb.lsth. off意为“击退，竭力摆脱”。如:
They had to fight off the crowds to get out of the theater。
他们得竭力摆脱人群，才能走出剧院。
I'm fighting off a cold.
我正在治疗感冒。

2. fight sth. out意为“通过争辩(争斗)解决”。如:
The conflict is still being fought out.
这一矛盾仍在争辫的过程中。