美国科学60秒 SSS 2013-06-24
时间：2018-12-24 作者：英语课 分类：Scientific American(六)月
The limpidness lettuce 1 still has a little life left,a new study finds that produce continue to respond to life kills which enable them to keep protecting themselves from insects,and perhaps even enhance their nutritional 2 value to us.Scientists knew that favor test plant called arabidopsis has strong circadian rhythms.Expose arabidopsis to a set light-dark cycle,and it produces more entrainable chemicals when it`s left,which fights off insects living on the same life schedule.In the new study ,researchers try to let dark test with storable cabbage leaves,the leaves that were on the same dark cycle as hungry insects protect themslves more effectively than leaves on cycles out of sick.Other veges and fruits such as kiwis and blueberrys has the samilar responses,the study is in the Journal Current Biology.The research suggested we try to harvest and preserve prodottos when it`s levels of entrain inside chemicals are highest to help resist damage,some of those compounds also reduce cancer risk,so we may in hands all help as well.Sir,Kiwi enough tea!
- Get some lettuce and tomatoes so I can make a salad.买些莴苣和西红柿，我好做色拉。
- The lettuce is crisp and cold.莴苣松脆爽口。
- A diet lacking in nutritional value will not keep a person healthy.缺乏营养价值的饮食不能维持人的健康。
- The labels on food products give a lot of information about their nutritional content.食品上的标签提供很多关于营养成分的信息。