fieldern.守场员fieldn.田地；领域；运动场；场地；田野；JAVA中的范畴vt.接球；派……上场；顺利处理vi.担任外场员adj.田间的；野外的field methods采集方法field manager会场管理field balance野外磁秤field forming字段生成field of firen.射程Field bus CAN现场总线CANField Linkage磁链field-aidedadj.场助的field-wardsadv.向原野；向田野field forcing[电] 场强力

1. Even though there are many researches on the field horsetail, there are not effective methods that the weed could be controlled by them.
   虽然报导问荆的文献较多，但目前还缺乏有效的防治方法。