中国有句谚语叫做“福无双至,祸不单行”。意思是说,幸运的事不会联袂而来,而灾祸却往往会接踵而至。这句谚语源于汉·刘向《说苑·权谋》:“此所谓福不重至,祸必重来者也。”很明显,此说带有较浓厚的迷信色彩。但仔细想来,却也有一定道理。“福无双至”且不论,“祸不单行”则并非完全是唯心之说。事物的存在往往不是孤立的,而是相互联系,相互影响,相互制约,甚至是相互依存的。就拿生物界来说,植物与动物、 There is a Chinese proverb called “blessing to fate, disaster does not work.” This means that lucky things do not come together, but the scourges tend to come one after another. This proverb stems from the Han Liu Xiang, “said Court trickery”: “The so-called blessing is not heavy, disaster will come too.” Obviously, this is said to have a more superstitious superstition. But think carefully, but there is some truth. “Fu warriors to” and no matter, “misfortune” is not entirely idealistic. The existence of things is often not isolated, but interrelated, mutual influence, mutual restraint, or even interdependence. Take the biological world, plants and animals,