v.游说；兜售；详细检查；细究
n.细查；论究；劝诱；民意调查
The party needs to canvass the uncommitted voters. 这个党需要向未表明态度的选民游说拉票。
These days they're busy for canvass. 这些天他们在忙着做民意调查。
n.兜揽生意的人；游说者
