环庚烷;软木烷;cycloheptane;Heptamethylene 正丁醛七环;七环;正丁基七环;n-Butylaldehyde-hepta-cycle;n-But……
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七环化合物 heptacyclic compound
正丁醛七环 N-Butyl Hepta-Cycle ; n-But ; n-Butylaldehyde-hepta-cycle
正丙基七环 Dioxepin,4,7-dihydro-2-propyl
二氧七环 Propyl-1,3-dioxocyclo-5-pentene
大七环 Big Seven Ring
正丁基七环 n-But
正丙基二氧七环 Dioxepin,4,7-dihydro-2-propyl
环氧七氯 Heptachlor epoxide ; Heptachlor-exo-epoxide ; Heptachlor-e
主题七环境保护 Environmental Protection
将异丁醛与1,4丁烯二醇缩合得到产物二氧七环，对产物进行了元素分析和IR分析。
The condensation compound was synthesized by 2 butene 1, 4 diol and iso butyric aldehyde, and was characterized by elemental analysis and IR.
去年七月份的出口量十分惊人，但是今年七月的环比仍然猛增了38.1%。
But exports leaped 38.1 percent from an already strong showing in the same month last year.
2009年七月，销量环比下降26%，是连续第五个月出现销量下滑。
In July sales were down 26%, the fifth successive monthly decl in e.
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