canvassv.游说;兜售;详细检查;细究n.细查;论究;劝诱;民意调查
canvass customer opinions用户调访
canvass for a new product到处去兜售新产品
canvass for contributions募捐
canvass for subscriptions招徕订货
canvass a district for votes为争取选票在选举区举行游说
canvass by distributing letters.通过发传单来获得人们意见。
canvass subscribers for a newspaper为报刊兜揽订户
"a pollster conducts public opinion polls""a headcounter counts heads"