不着边际，汉语成语，拼音是bù zhuó biān jì，意思是挨不着边儿。多指说话空泛，不接触实际。出自《水浒全传》。
一个人注视一个最普通的自然产品不会不发现一种不著边际想像的食物。
One cannot fix one's eyes on the commonest natural production without finding food for a rambling fancy.
想像永远可以天马行空，大家可能说这是很无聊的事情，但是我这一晚脑里就是想著这些不著边际的事情。
Imagination can take you to the impossible and some of you might think it might be a bit absurd, but for the whole night my brain was thinking about these impossible things.
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