flight of fancy idiom
异想天开；想入非非
an idea that shows a lot of imagination but is not practical
He was talking about cycling across the US or was that just another flight of fancy? 他正在谈论骑自行车横穿美国，这又是一次异想天开吗？
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。