单词	spelunker
释义	spelunkingspe‧lunk‧ing /spəˈlʌŋkɪŋ/ noun [uncountable] American English Word Origin WORD ORIGINspelunking Origin: 1900-2000 Latin spelunca ‘cave’, from Greek spelynx the sport of walking and climbing in caves—spelunker noun [countable]
随便看	difference different differential differential calculus differential gear differentiate differentiation differently difficult difficulty diffidence diffident diffidently diffract diffraction diffuse diffuseness diffusion dig digerati digest digestible digestion digestive digestive biscuit

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