正渗透是一种自然现象，但同样也是近年来发展起来的一种浓度驱动的新型膜分离技术，它是依靠选择性渗透膜两侧的渗透压差为驱动力自发实现水传递的膜分离过程，是目前世界膜分离领域研究的热点之一。
水正渗透进碎石底层。
随着向文化型社会的成功过渡，社会文化正渗透入生活的各个领域。
With the successful transition to the culture of society, culture is infiltrating into all areas of life.
从预订机票酒店到挑选餐厅，社会媒体正渗透到旅途的每一个环节。
Social media are being incorporated at a rapid rate into every part of a journey, from making the reservation to finding out where to eat. For instance.
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