名词
中文翻译：上胚轴同义词
同义词：
['upper protoxylem', 'upper xylem', 'upper vascular cambium']
例句：
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1. The plant's growth is closely related to the development of its upper protoxylem.
植物的生长与上胚轴的发展密切相关。
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2. In the process of photosynthesis, the upper protoxylem plays a crucial role inthe transportation of nutrients.
在光合作用过程中，上胚轴在营养物质的运输中起着至关重要的作用。
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3. The upper protoxylem is responsible for transporting water and minerals from the roots to the leaves.
上胚轴负责将水分和矿物质从根部输送到叶子。