四: four要: important; essential品: article; product四要求: ask demand require request四要素: four elements需要品: requested; requisite主要品: a piece of resistance四要素肥料: four elements fertilizer四要一没有: four wants and one without四要一有: four wants and one without学习四要素: had better should ought to间接需要品: goods of second order恳求；需要品；需要: requested (l03)直接需要品: goods of first order主要品种: main breed; main variety; principal item; the main species主要品质因子: primary quality indexes由四要素形成的: quaternary如果您是分析型的四要做: if you are analysis type两个主要品种的亲本: parentage of the two leading varieties评定防护服装材料对化学要品的选择: standard guide for selection of chemicals to evaluate protective clothing materials四药门花属: tetrathyrium subcordatum四药门花: tetrathyrium subcordatum四摇臂式酸洗机: four arm batch pickler; four arm pickling machine; four-arm pickling machine四氧铯, 过四氧化铯: cesium tetraoxide四氧嘧啶血症: alloxanemia
