“urea herbicide”的概念、定义、翻译、参考文献-科学参考

单词	urea herbicide
释义	urea herbicide Encyclopedia 农学脲类除草剂释 urea herbicide脲类除草剂一类光合作用光系统PS Ⅱ电子传递抑制剂或细胞分裂抑制剂。结构式中R1一般为取代苯环或五六元杂环及稠合环，脂肪链组成的桥连环也可以，但以取代苯环居多；R2大多为氢；R3一般为短链的脂肪烷烃；R4一般为氢、短链的脂肪烃或烷氧基。
随便看	tunnel boring machine submergence tunnel breakdown tunnel by drilling and blasting tunnel by pipe jacking tunnel by shield digging tunnel coefficient tunnel cross section design tunnel cultivation tunnel diagram tunnel diod tunnel diode tunnel diversion tunneled space tunnel effect tunnel electrical and mechanical facilities information acquisition equipment tunnel engineering survey tunnel entrance lighting tunnel erosion tunnel excavation tunnel exploration tunnel exploratory method tunnel fatigue-awakening section tunnel gas monitoring instrument tunnel geology prediction instrument tunneling

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