active adj. 1.活動的,有活動力的;【生物學】活性的;【電學】有功的;【無線電】有源的;【物理學】放射性的。 2.有生氣的,活潑的,靈敏的,敏捷的;主動的,能動的,積極的;有力的,勤勉的;【醫學】有特效的。 3.現行的,活動中的;【軍事】現役的。 an active demand 暢銷。 an active volcano 活火山。 The market is active. 市場活躍。 active measures 積極手段。 on active service 【軍事】現役,現役中的。 take an active part [interest] in 積極參加。 adv. -ly 活躍地;積極地,能動地;【語法】主動地。 n. -ness 活躍,積極性。
be active in 對…很積極; 活躍于; 積極參加; 積極于; 在......里活躍; 在……活躍
Adults will visit flowers , mating and find hostplant aristolochia kaempferi after eclosion . the active time of adults is from 9 : 00 a . m . to 18 : 00 p . m . , 雌蝶羽化后就近訪花、交尾,尋找寄主植物馬兜鈴產卵、雌蟲孕卵量為18 - 20粒;飛行緩慢,反應遲鈍,相對容易捕捉。
3 . passive and active time - domain demodulation schemes were demonstrated based on a fiber bragg grating used as a tunable filter controlled by a piezoelectric stack , which was driven by an electrical sine wave signal . the measured strain applied on the sensor axially could be judged by observing the interval of the output between notches within a driving period in time - domain 利用匹配濾波技術,分別采用無源和有源方式,借助受pzt驅動的解調光柵,將待測應變信息變為時序負脈沖間隔的變化,利用常規的示波器觀測同一掃描周期中兩負脈沖在時域中間隔的變化來確定待測應變的變化。