利剑斩不了愁是真的,但利刀不能真正把水劈开,就不是真的了。真有利刀能劈水我国一首经典老歌里有这样一句歌词:哪有利刀能劈水,哪有利剑能斩愁?歌词用利刀不能劈水来类比利剑不能斩愁。这个类比要是在过去看,还是非常生动准确的,但在现在看,就不那么准确了,因为目前研究人员已经发明出了真能劈水的利刀。最近,美国亚利桑那州立大学的研究人员就研制出一把能劈水的利刀,它可以很轻易将水滴一分为 Sword can not cut the worry is true, but the knife can not really split the water, it is not real. Really good knife can cut water Our classic song has a song like this: How can a knife cut water, which sword can cut worry? Lyrics with a knife can not split water to analogy sword can not cut off sorrow. This analogy is still very vivid and accurate in the past, but it is not so accurate now because researchers have invented the real knife that can cut water. Recently, researchers at Arizona State University in the United States developed a cutting knife that cleaves water, which can easily be divided into