单词	smack-dab
释义	smack-dab (smăkdăb) adv. Slang Squarely; directly: stood smack-dab in the middle of the freeway. [SMACK1 + DAB1, with a sudden contact.]
随便看	different differentia differentiability differentiable differential differential analyzer differential calculus differential coefficient differential equation differential gear differentially differential rate differentiate differentiation differently differently abled differentness difficult difficultly difficulty diffidence diffident diffidently diffract diffraction

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