sit-up (n.)是什么意思，sit-up (n.)的翻译，sit-up (n.)音标、读音、用法和例句

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sit-up (n.)是什么意思，sit-up (n.)的翻译，sit-up (n.)音标、读音、用法和例句_伍贰汉英词典

sit-up (n.)

同根派生