Don't use the blood for blood through lessons and lessons to be free.
别用鲜血换教训应借教训免血泪。
English lessons needs to form the target language through topics of language environment.
英语的课堂教学需要借助话题以形成目标语言的语言环境。
Everyone will study the lessons and their homework through the Internet.
每个人都将通过网络学习课程、做家庭作业。
The most valuable lessons, however, were learned through daily life on Mir.
然而，最宝贵的经验来自于在米尔上的日常生活中。
The most valuable lessons, however, were learned through daily life on Mir.
然而，最宝贵的经验来自于在米尔上的日常生活中。
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