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超重和失重现象的探索
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{getChapterName}
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{getTaskName}
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{activityStartTimeStr}
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{activityLength}
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{getTaskName}
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{ "i18nChapterName": "章", "i18nUnitName": "节", "i18nLessonName": "课时", "i18nTaskName":"任务" }
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