1. The recent deterioration has been caused by an apparently endless recession. 最近的恶化是由貌似没完没了的萧条造成的。
2. The deterioration of the ecological system is accelerating because of the dramatic increase of human production and consumption. 由于人类生产和消费活动的急剧增加，生态系统正在加速恶化。
3. The steady deterioration of the very climate of this very planet is becoming a war of the first order, and by any measure, the U.S. is losing. 这个星球气候的持续恶化正在发展为一场至关重要的战争，不论以哪种标准衡量，美国都在输掉这场战争。
4. Chinese government is poised to conduct its first national survey of pollution sources in February to help control environmental deterioration in the country. 中国政府准备在2月份进行首次全国污染源调查，以帮助控制环境恶化。
5. However, since the presence of large numbers of tourists tends to accelerate the deterioration of a site, installation of a cable car is certain to result in harm to the ruins. 然而，大量游客的出现往往会加速遗址的退化，安装缆车必然会对遗址造成伤害。
