Finally, we should keep our rooms clean and the air fresh all the time.
最后，我们应该保持我们的房间干净，空气新鲜。
Boys in my class were digging holes in he classroom to let fresh air in. Then they tried to dig a passage with their bare hands, and finally, I found a way to escape.
班里的男生在房间的废墟中正在努力挖开一些窟窿，让新鲜空气能够透进来，后来，他们又努力地用双手刨出了一个通道，我们终于设法逃了出来。
Finally we should keep our rooms clean and the air fresh all the time.
最后我们应该持续我们的房间干净空气新鲜。
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