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| Leaves in the Fall | |
| 作者姓名： | 李唯一 |
| 摘 要： | We all enjoy the beautiful show of colors as leaves change eachfall.Did you ever wonder how and why this happens.To answer thatquestion,we first have to understand what leaves ave and what they do. Leaves are nature’s food factories.Plants take water from the |
| 本文献已被 CNKI 等数据库收录！ | |