元素: 1.(要素) element; elementary substance2.[数学] [化学] element 短语和例子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 a
首: Ⅰ名词1.(头) head 短语和例子昂首 hold one's head high; 搔首 scratch one's head2.(首领) leader; head; chief 短语和例子匪首 bandit chieftain; 祸首 chief culprit; 为首 with sb. as the leader3.(表示方位) aspect 短语和例子下首 rig
