单词	biconcave
释义	bi·con·cave (bī′kŏn-kāv, bī-kŏnkāv′) adj. Concave on both sides or surfaces: a biconcave lens. bi′con·cavi·ty (-kăvĭ-tē) n. biconcave biconcave (left) and biconvex (right) lenses
随便看	poop poop poop poop chute poop deck pooper-scooper poo-poo poop out poor poor box poor boy poor farm poorhouse poori poorish poor law poorly poormouth poorness pop pop pop POP pop. pop art

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