Hydrotropism (hydrotropic movement) a tropism in which the stimulus is water. It is a special kind of chemotropism.
向水性(向水运动)：是由于水分刺激而产生的向性运动，属于向化性的一种特殊类型。
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General properties of amphoteric surfactants were introduced such as rheological property, hydrotropic property, lime soap dispersing ability and hard water resistance.