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- Longer residue time (5-7 days) reduce injection time. 3-5 injection times is one cause. 更长的体内存留时间，长达5-7天，从而减少注射次数，3-5次注射为一疗程。
- Biochemistry: Mode of action: Non-systemic acaricide with contact action, and long residual activity. 作用特点一种杀螨谱广、持效期长、毒性低、对天敌、蜜蜂及作物比较安全的杀螨剂。
- Biochemistry: Mode of action: Specific acaricide with contact action, and long residual activity. 作用特点特效杀螨剂，药效持久。
- There was a long lag in forwarding mail to us. 转寄给我们的邮件晚了很久才拿到。
- You can keep my book as long as you like. 我的书你要借多久都随你的便。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。
- The beggar spun a long yarn about his misfortunes. 那个乞丐编造了一大篇自己如何遭遇不幸的故事。
- Because of its long residual activity,controlled release as well as safety and low toxicity to mammals,microcapsule plays more and more important roles in pesticide formulations. 由于其具有持效期长，控制释放，毒性低，安全方便等特点，正成为农药新剂型的发展方向。
- How long will our food supplies hold out? 我们的储粮还能维持多久?
- Studies on Effect of Some Long Residue Herbicides to Succeeding Crop Flax 二种长残留除草剂对后茬作物亚麻的影响研究
- It was a long trudge up the hill. 那段上山的路很难走。
- Mr Jones has a long history of heart trouble. 琼斯先生有长期的心脏病史。
- Degradation dynamics of chlorpyrifos, trichlorphon, and cypermethrin residues in onion were investigated.Chlorpyrifos residues showed relatively long residual when sprayed onto onions. 摘要研究了毒死蜱、敌百虫和氯氰菊酯不同施药方法在洋葱上的残留降解动态。
- Cream cakes are no long a luxury. 奶油蛋糕再也不是奢侈品了。
- It took a long while to do the work. 做这个工作花了许多时间。
- But some environmental issues caused by sulfonylurea herbicides, such as Chlorimuron and Chlorsulfuron, are urgently settled because of their too long residual period and the fast growth of the weeds. 但其中部分产品如豆磺隆、绿磺隆等对一些农作物不安全,残效期过长及抗性杂草增加很快等问题亟待解决。
- Between ourselves, that young man's hair is much too long. 就咱俩之间说说，那小伙子的头发实在是太长了。
- It may take a long time to find a solution to the problem. 也许要花很长时间才能找到解决这个问题的办法。
- It was very thoughtless of you to keep her waiting so long. 你让她等那么久也太不体谅人了。
- He delivered a long prose full of platitudes. 他发表了一篇充满陈词滥调的文章。
