单词	unpigmented
释义	unpigmented adjective un·​pig·​ment·​ed ˌən-ˈpig-mən-təd  : having no pigment : nonpigmented unpigmented cells unpigmented skin Example Sentences Recent Examples on the Web Many birds lay white, unpigmented eggs—as do all lizards, turtles, crocodiles, and the only known egg-laying mammals, the platypus and the echidna. National Geographic, 18 Sep. 2017 The first layer of skin eventually peels off, leaving a pale or pink area of unpigmented skin. Dr. Manny Alvarez, Fox News, 12 July 2017 Word History First Known Use 1853, in the meaning defined above Medical Definition unpigmented adjective un·​pig·​ment·​ed -ˈpig-mənt-əd  : not pigmented : having no pigment
随便看	keep something close to one's chest keep something close to the vest keep something under one's hat keep something up one's sleeve keep step keep tabs on keep the ball rolling keep the faith keep the wolf from the door keep things in proportion keep time keep to keep to oneself keep track keep under keep under one's hat keep under surveillance keep up keep up (with) keep up appearances keep up on keep up one's end keep up one's sleeve keep up the good work keep up with

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