propose详细用法总结

　　作业

　　The processes of photosynthesis, by which carbon dioxide and water are combined --in the presence of chlorophyll (叶绿素) and with energy derived from light -- to form sugars, require that carbon dioxide from the air enter the plant.

　　这句话当中，也有一个 sb require that sb (should) do sth 的结构。请仔细分析这个句子，并将其完整翻译出来哦~

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