单词	buttock
释义	buttockbuttock /ˈbʌt̮ək/ noun [countable usually plural] Etymology ETYMOLOGYbuttock Origin: Old English buttuc one of the fleshy parts of your body that you sit on
随便看	Surface Transportation Board, the surface water surfactant surfboard surfeit surfer surfing surge surgeon Surgeon General surge protector surgery surgical surgically surgical strike Surinam Surinamese surliness surly surmise surmount surmountable surname surpass surpassing

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