active adj. 1.活动的,有活动力的;【生物学】活性的;【电学】有功的;【无线电】有源的;【物理学】放射性的。 2.有生气的,活泼的,灵敏的,敏捷的;主动的,能动的,积极的;有力的,勤勉的;【医学】有特效的。 3.现行的,活动中的;【军事】现役的。 an active demand 畅销。 an active volcano 活火山。 The market is active. 市场活跃。 active measures 积极手段。 on active service 【军事】现役,现役中的。 take an active part [interest] in 积极参加。 adv. -ly 活跃地;积极地,能动地;【语法】主动地。 n. -ness 活跃,积极性。
be active in 对…很积极; 活跃于; 积极参加; 积极于; 在......里活跃; 在……活跃
Abstract : in the present paper the progress was reviewed in the active filler metals with different temperatures for ceramic to metal brazing and related brazing technique of reducing joining - gap residual stress . it was recommended that the key developing field for our country should be the high temperature active filler with heat - and oxidation - resisting properties . the brazing techniques to reduce joining - gap residual stress and the principles to select transition layers for the joining gap were also introduced 文摘:阐述了陶瓷/金属钎焊用不同温度的活性钎料及以降低焊缝残余应力为中心的钎焊工艺进展;指出:在我国耐高温、抗氧化性优良的高温耐热型活性钎料是重点发展方向;介绍了降低焊缝残余应力的钎焊工艺和焊缝中间添加过渡层的选择原则。