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每天一分钟，和英语老师一起学习220个高频词，第49个on
220个高频词
一起学习220个高频词57/70
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App01:31220个高频词
App01:27App02:40App01:03App02:36App01:10App01:50App01:08App02:10App02:46App01:21App01:10App01:16App01:45App01:40App01:31
