水果和蔬菜离开土壤以后,很容易干枯,因为它们的根不能再吸收养分和水分了。而洋葱却例外,它丝毫没有干枯的迹象。这是为什么呢?洋葱的故乡是又干又热的沙漠,为了能够在沙漠的环境中生存下去,洋葱非常珍惜自己获得的一点点水分和营养物质,用一层一层的“衣服”鳞片紧紧地将它们包裹起来,使水分不能轻易地从它的身体里逃走。 After they leave the soil, the fruits and vegetables tend to dry out, because their roots can no longer absorb nutrients and moisture. The exception is the onion, which has no signs of dryness. Why is this? The hometown of onions is a hot and dry desert, in order to survive in the desert environment, onions cherish a little bit of their own access to water and nutrients, with layers of “clothes” The scales wrap them tightly so that water can not easily escape from its body.