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
The results indicated that the ree tracer technology has high precision to quantify the spatial - temporal process of soil erosion ; in earlier rainfall course , the development degree of sheet and nil erosion was general equation ; otherwise in the following course , the rill erosion was dominant in the total erosion , its average erosion acceleration and the average erosion rate was 15 and 9 times of sheet erosion , respectively ; in the end of experiment , the rill erosion took up 90 % of total erosion amount ; the section of slope bottom occupying about 1 / 3 slope area was active erosion segment in this experiment 结果表明: ree示踪技术对定量研究土壤侵蚀具有较高的精度;降雨前期,片蚀与细沟侵蚀发育程度基本相当;后期细沟侵蚀占据坡面侵蚀的主导地位,其侵蚀平均加速度和平均侵蚀率分别是片蚀的15倍、 9倍;试验结束,细沟侵蚀占据坡面总侵蚀的90 % ;本试验条件下,坡面下1 / 3区域为侵蚀活跃带。