以下为句子列表：
英文: 3 On the other hand, C4 photosynthesis seems to have evolved more than 50 times, in 19 families of plant.
中文: 另一方面，C4植物的光合形式已经演化了不下50次，形成了19个植物体系。
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英文: A few years ago, geneticists managed to get rice to produce one of the enzymes needed for C4 photosynthesis by transplanting the relevant gene from maize.
中文: 几年前，遗传学家通过将玉米中的相关基因转入水稻，从而在水稻中成功合成了C4光合作用必需酶的一种。
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英文: Abstract: The data collection system of a home-made photoacoustic spectrometer for photosynthesis study was reformed.
中文: 文摘:对本室研制的用于光合作用研究的光声光谱仪的数据采集系统作了改进。
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英文: Abstract: Through the research of growth, water and photosynthesis characteristic of maize under different combination of air humidity with soil moisture, the results showed the harm of soil water deficit exceeded that of air drought, water status and phy
中文: 文摘:通过对不同土壤大气湿度组合下玉米生长、水分及光合特性的研究，认为土壤水分亏缺对玉米的影响要超过大气干旱。
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英文: C4 plants often absorb CO2 from the air in one type of cell and then convert it to sugars through photosynthesis in another.
中文: C4植物常常将空气中的CO2吸入到某一类细胞中，然后再在另一类细胞中利用光合作用将其转化为糖类。
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