It introduces the significance of the subject and the main research work.
介绍了该课题的研究意义及主要研究工作。
Therefore, faucet is the main essential subject in research of "water-using behavior".
而水龙头自然就成为用水行为研究的主要对象。
Therefore, faucet is the main essential subject in research of "water-using behavior".
而水龙头自然就成为用水行为研究的主要对象。
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