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exclosure
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草地围封
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采用人为干预手段将草场划分为若干小区并加之围栏后,排除放牧干扰(例如家畜的践踏、采食及粪便等) 而达到调节草地生态系统草食动物与植物关系的草地管理手段。
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safety appraisal of pumping station
safety appraiser
safety assessment
safety assessment of actuality
safety assessment of blasting projects
safety assessment of defects than the standard
safety assessment of food toxicology
safety assessment of pipeline project
safety assessment of railway signaling
safety assessment of seismic structure
safety assessment organization
safety assessment system of agricultural genetically modified organisms
safety assessment test of SRM
safety assurance system of construction project
safety attitude
safety audit
safety audits and safety assessment
safety awareness
safety barrier
safety behavior
safety behavior supervision
safety benefits rule
safety certification
safety certification authority
safety certification system for derived lines of transgenic Bt cotton
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