In the forests of New Brunswick, for example, various pesticides have been sprayed in the past 25 years in efforts to control the spruce budworm , an economically significant pest.

例如，在NB的森林里，过去的25年里，多种杀虫剂被喷洒以控制云杉蚜虫，一种经济上严重的病害虫。

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In the forests of New Brunswick, for example, various pesticides have been sprayed in the past 25 years in efforts to control the spruce budworm , an economically significant pest.

例如，在NB的森林里，过去的25年里，多种杀虫剂被喷洒以控制云杉蚜虫，一种经济上严重的病害虫。

youdao