Finding of a survey of Systemsmagazine subscribers: Thirty percent ofall merchandise orders placed by subscribers in response to advertisements inthe magazine last year were placed by subscribers under age thirty-five. Finding of a survey of advertisersin Systems magazine: Most of themerchandise orders placed in response to advertisements in Systems last yearwere placed by people under age thirty-five.
这两句话是什么意思啊。。求大神解答一下
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