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- As preventive, spray plants with systemic insecticide or fumigate them regularly. 作为预防措施，要用内吸杀虫剂对植物定期喷洒，或熏蒸。
- Application: it is a systemic insecticide, with both contact and stomach action against sucking mouthparts pests such as plant hoppers, aphids, leafhoppers, thrips whitefly,ect. 用途：主要用于防治水稻、小麦、棉花等作物上的刺吸式口器害虫，如蚜虫、叶蝉、蓟马、白粉虱及马铃薯甲虫和麦秆蝇等。
- Systemic insecticides have shown particular promise. 内吸杀虫剂看来特别有效。
- According to the author's experience in the control of cotton aphids.the systemic insecticidal action of Systox was different when it was applied at different times of the day. 正>在与贫下中农一起用1059(内吸磷)防治棉蚜的多次生产实践中作者曾经注意到,一天之内不同时间喷药,药效有差异,傍晚喷药药效较好。
- "disulfoton:a pale yellow, highly toxic systemic insecticide, CHOPS, used for some vegetables and flowers." "二硫松:一种剧毒的浅黄色系统杀虫剂;CHOPS;可用于一些蔬菜和花.;"
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- As preventive, spray plants with systemic insecticide or fumigate them regularly 作为预防措施，要用内吸杀虫剂对植物定期喷洒，或熏蒸。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
- He said he used this system in the year dot. 他说他很久以前用过这个系统。
- Our manager is conversant with account system. 我们的经理精通会计制度。
- The system can translate English into Chinese. 这个系统能将英语译为汉语。
- The caste system is still strong in India. 种姓制度在印度仍然很牢固。
- I can send him a note via the internal mail system. 我可以通过内部通信系统给他发个通知。
