单词	tone-up
释义	tone-up noun plural -s : a toning-up exercise, treatment, or medicine Word History Etymology from tone up, verb
随便看	learn something at one's mother's knee learn the ropes learn to live with something learnable learned learned profession learnedlier learnedliest learnedly learnedness learnednesses learner learner driver learner's permit learners learning learning curve learning difference learning difficulty learning disability learning disabled learnings learns learnt lears

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