题目
through
The department,through its cooperative state research,education,and extension service,has been supporting a project in Michigan .That state has a short growing season.
The department,through its cooperative state research,education,and extension service,has been supporting a project in Michigan .That state has a short growing season.
提问时间：2021-04-13
答案
在这里它用做介词,介词后通常跟短语,在这里的意思是：通过,穿过,凭借
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