...入侵区地下水保护体系_水利工程 关键词：三条红线；海水入侵区；地下水保护体系；烟台市 [gap=1156]Key words:Three Red Lines;seawater intrusion region;groundwater protection system;Yantai city ..
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Three lines of the first paragraph were underscored in red ink.
第一段中有三行用红墨水在下面画了线。
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There're three lines that have been completed-the Brown line, the Red line and the Orange line.
有3条路线已经完工了——棕色路线、红色路线和橘色路线。
Politics, religion and sex are the three "red lines" of the Arab world: subjects you're not supposed to tackle in word or deed.
CNN: Why Arab world must learn to talk about sex
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