water requirements for self purification of the stream的用法和樣例：
例句
- The process that oiliness wastewater into water disappears as time goes on is called water self-purification.
進(jìn)入水體的油污隨著(zhù)時(shí)間的推移會(huì )逐步消失，這就是水體的自?xún)糇饔谩?/li> - For example, manufacturers created dirt and water repellent paint after studying the lotus flower, which has a self-cleansing surface.
例如，從蓮花葉的自?xún)裟芰χ械玫絾⑹径芯砍雠艍m排水涂層。
