At the crack of dawn, he would run up the slopes with his skis on, an unbelievably back-breaking activity.
2019年6月六级真题(第一套)听力 Section B
Unfortunately for them and often the taxpayers, our energy systems are a bit like an aircraft carrier : they are unbelievably expensive, they are built to last for a very long time, they have a huge amount of inertia meaning it takes a lot of energy to se
2015年12月六级真题(第一套)阅读 Section B
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
不可思议的;难以置信的;极好的;非常棒的
If you say that something is unbelievable, you are emphasizing that it is very good, impressive, intense, or extreme.