This is why repeated attempts at reform legislation have failed in recent years, leaving the Postal Service unable to pay its bills except by deferring vital modernization.
这就是为什么近年来多次改革立法尝试都失败了，导致邮政服务只能通过推迟关键的现代化进程来支付账单。
repeated government warnings
政府多次警告
But when Swetnam enrolled in graduate school at the University of Arizona's Laboratory of Tree-Ring Research, he was surprised to find a record of repeated blazes dating back hundreds of years before European colonists arrived on the continent.
但当斯威特纳姆进入亚利桑那大学的树木年轮研究实验室读研究生时，他惊讶地发现，早在欧洲殖民者到达大陆数百年之前，就有重复的火灾记录。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。