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1.The farmers used to flock spraying the crops in the fields.
农民过去经常在田间进行群体喷洒。
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2.The pest control team is conducting flock spraying operations in the city.
灭虫队正在该市进行群体喷洒作业。
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3. The farmers are using a new sprayer that can perform flock spraying efficiently.
农民们正在使用一种新设计的喷雾器，能够高效地进行群体喷洒。