单词	Liesegang ring
释义	Liesegang ring noun Lie·​se·​gang ring ˈlēzəˌgäŋ- : one of a series of usually concentric bands of a precipitate that are separated by clear spaces and that are often formed in gels by periodic or rhythmic precipitation —usually used in plural Word History Etymology after R. E. Liesegang †1947 German chemist
随便看	proostraca proostracum prootic prootic bone prootics prooxidant prooxygen prooxygenic prop prop (up) prop boy prop forward prop joint prop root prop up prop wash prop word propadiene Propadrine propaedeutic propaedeutics propagability propagand propaganda propaganda machine

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