三聚甲醛

Last year Joe Munyaneza, an entomologist at the Yakima Agricultural Research Laboratory in Washington state, found that tubers from plants exposed to these insects showed typical zebra-chip symptoms, while those from unexposed plants had none.

去年，华盛顿州雅基马农业研究实验室的昆虫学家乔·蒙耶尼沙发现，受木虱为害的马铃薯植株，块茎会出现典型的"斑马片"症状，而未受害植株，块茎没有这种症状。

Aimed at the biochemical technology of sewage treatment by biological rotating disk,a water circulating wheel has been designed to improve the treatment efficiency of biological rotating disk, and to develope an integrative installation technology.

针对生物转盘污水处理工艺，研究设计出能提高生物转盘处理效率的循环水轮的结构及一体化的安装工艺形式，以非能源的方式提高了系统耐冲击负荷能力和去除效率，并通过示范工程进行验证，充分肯定了该技术的高效性和实用性。