难以想象的用英语怎么说？

难以想象的

例句

• This sort of work would have been inconceivable before the advent of microprocessors. 在微处理机问世之前这种工作是难以想象的。
• a problem of mind-boggling complexity 复杂得难以想象的问题
• The children here have lived through unimaginable horrors. 这里的孩子经历了难以想象的恐惧。
• It is hard to imagine what it is like to sleep rough at any time, but doubly so in the current freezing weather. 无论何时，露宿街头的滋味都是难以想象的，更何况是在现在这么冷的天气下。