单词	tumbler
释义	tumblertumbler /ˈtʌmblɚ/ noun [countable] Etymology ETYMOLOGYtumbler Origin: 1300-1400 tumble; (1-2) because it was originally made with a round or pointed bottom 1 a drinking glass with a flat bottom and no handle2old-fashioned someone who performs special movements such as doing flips (=a jump in which you turn over completely in the air) SYN acrobat
随便看	classless classlessness classmate class one fulcrum class ring classroom class struggle class three fulcrum classwork classy clatter clause claustrophobia claustrophobic clavichord clavicle claw clay clayey Clay, Henry Claymation Clayton Antitrust Act, the clean Clean Air Act, the clean-cut

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