1．urge vt.催促；督促；力劝→urgent adj.紧急的，紧迫的；催促的，急切的→urgency n．紧急；急迫
2．incredible adj.极好的，极大的；不能相信的，难以置信的→incredibly adv.极端地；令人难以置信地
3．preserve vt.维护，保护，保存；维持→preservation n．维护，保护；保持；保养
4．assess vt.评估，评定；估算→assessment n．评估；估算
collapse v．倒塌；昏倒；(尤指工作劳累后)坐下，躺下放松；突然失败；崩溃；瓦解
①The roof collapsed under the weight of snow. 倒塌
②He collapsed in the street and died two hours later. 昏倒
③When I get home I like to collapse on the sofa and listen to music. 坐下
④Talks between management and unions have collapsed. 失败；崩溃
