单词	age coating
释义	age coating noun : the black deposit formed on the inner surface of an incandescent electric-lamp bulb by disintegration of the filament Word History First Known Use 1892, in the meaning defined above
随便看	didies didinia didinium didiniums Didiplis didiploid didjeridoo didjeridoos didn't didn't have the heart didna dido didodecahedron didoes didos Didot didrachm didrachma didrachmal didrachmas didrachmon didrachmons didrachms didric didst

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