必需: essential; indispensable; vi ...元素: element; elementary substanc ...要素: essential factor; key elemen ...必需元素: essential element; indispensable element非必需元素: non-element; nonessential element生命必需元素: essential element成分,要素;元素: element单元;元素;要素: element元素要素: elements必需微量元素: essential trace element必需矿物质元素: essential mineral element要素,测量元素之一: parameter必需: essential; indispensable; vitally need 发展工业所必需的原料 raw materials essential for industrial development; 用在最必需的地方 be used where it is most needed; 这些参考书是我们所必需的。 these reference books are necessary to us.; 必需品 necessities; consumer goods; necessaries; requirement生命要素〔维持生命所必需的因素: vital factors要素: essential factor; key element; part; element; factor打散列表,使其中每个元素生成单独的要素: listexploder explodes each list member on each input feature out into its own feature元素: 1.(要素) element; elementary substance2.[数学] [化学] element 水是含有氢元素和氧元素的化合物。 water is a compound containing the elements hydrogen and oxygen.; 元素表 list of elements; 元素分析 [分析化学] ultimate analysis; elementary analysis; elemental analysis; 元素符号 symbol of element; 元素周期表 periodic table [system] of elements; 元素周期律 periodic law 提取列表中指定位置的元素成为要素的属性: listindexer demotes the attributes of the list element specified by the index to become main attributes of the feature必需的: essential; indispensable for/to; material; necessary; necessitous; obligate; required; requisite; vital必需费: necessary expenses必需酶: indispensable enzyme必需品: daily commodity; essential commodities; essential commodity; essential goods; estovers; indispensable; material; nece ity; necessaries; necessary wants; necessities; necessity goods; necessity n. something that is necessary; needments; requirements; requisite; want必需时: si op. sit; si opus sit必需项: entry required必需做: erfordern bentigen notwendig machen