六级All the forecasts, plans, and anticipations cited above have failed so miserably because their authors and promoters thought the transitions they hoped to implement would proceed unlike all previous energy transitions, and that their progress could be accelerated in an unprecedented manner.

上述所有预测、计划和预期都惨遭失败，因为它们的作者和推动者认为，他们希望实现的转型将不同于以往所有的能源转型，并且可以以前所未有的方式加速其进展。

2015年12月阅读原文

六级Online security cameras, intelligent lighting and a wealth of sensors that control both temperature and air quality are offering an unprecedented level of control, efficiency, and improvements to what were once classed necessary costs when running a busin

在线安全摄像头、智能照明和大量控制温度和空气质量的传感器提供了前所未有的控制水平、效率，并改善了曾经被列为经营企业所需的成本

2017年12月六级真题（第二套）阅读 Section C

六级Meanwhile, tuition has soared, leaving graduating students with unprecedented loan debt.

与此同时，学费飙升，给即将毕业的学生留下了前所未有的贷款债务。

2012年6月阅读原文

六级This means an unprecedented number of people are surviving longer in conditions requiring expert support.

这意味着，在需要专家支持的条件下，数量空前的人活得更长。

2018年12月六级真题（第二套）听力 Section C

六级The oldest continuously operated commercial hydro-electric plant in the is on ’s , and it went into commercial service in 189 As Vaclav Smil points out, “All the forecasts, plans, and anticipations cited above have failed so miserably because their authors and promoters thought the transitions they hoped to implement would proceed unlike all previous energy transitions, and that their progress could be accelerated in an unprecedented manner.

年代最古老的连续运行的商业水力发电厂，于189年投入商业服务

2015年12月大学英语六级考试真题（二）

六级What is happening now is historically unprecedented.

现在发生的事情是历史上前所未有的。

2010年12月英语六级真题

考研Writing for the National Immigration Forum, Gregory Rodriguez reports that today’s immigration is neither at unprecedented levels nor resistant to assimilation.

Gregory Rodriguez为国家移民论坛撰文称，今天的移民既没有达到前所未有的水平，也没有抵制同化。

2006年全国硕士研究生招生考试英语试题