一个很好的背诵单词的工具，可以自动计算时间，里面含有大量单词库。-a good tool to memorize words, it will automatically calculate time, it contains a large number of words for.

我收集的网上的英语经典句子的背诵 对学习英语很有好处-online collection of English phrases to memorize classical learning English is very good