Organized in1966 by the Fish and Wildlife Service,the Breeding Bird Survey uses annual roadside couns along estalished rounts for monitoring of population changes of as many as,or of more than 250 bird species ,including 180 songbirds.
答案:to monitor changes in the populations of
问题:原句要表达的意思是大于等于,改后的意思是大于 改变的句子的意思,应该不对吧???
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大于等于应该用no less than,A的表达实在是wordy。
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