slippery
- adj. 滑的；狡猾的；不稳定的
考试真题
- Energy independence" and its rhetorical (修辞的) companion "energy security" are, however, slippery concepts that are rarely though through.
出自-2014年6月阅读原文
- This slippery slope of eroding ethics and bigger risks leads only to disaster.
出自-2011年12月阅读原文
- The company spent the last five years developing solar panels that are only about a quarter of an inch thick and are strong enough to stand up to heavy highway traffic without breaking or making the roads more slippery.
2017年12月四级真题（第二套）听力 Section A
- They calculated that rolling the block required about as much force as moving it along a slippery path.
2015年高考英语四川卷 阅读理解 阅读E 原文