季节和叶位以春季中部叶较好。
The middle leaves in spring are better in leaf order and season.
叶片功能衰老的先后次序是植株下部叶片，其次是顶部叶片，最后是穗位叶和中部叶片。
The senescence order was leaves at plant bases first, then the leaves oil the top, the leaves in the middle the last.
“人造叶”将利用构成光合作用中部分自然过程的反应作用，将阳光和水变成一种清洁燃料的来源。
An artificial leaf would use a reaction that forms part of the natural process of photosynthesis to turn sunlight and water into a clean fuel source.
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