4.The dodder is one kind of annual autoecious weed of alfalfa, cosmopolitan weed quarantine object.
摘要菟丝子是苜蓿田中最常见的一年杂草,是世界的杂草检疫对象。
5.In this paper,the methods of producing sodium diacetate have been described.It is widely used as high effective preservative in grains,dodders,foods and so on.