单一可转移投票制，单记可让渡投票制（所选的第一位候选人失败或所得票数已经超过必要数额，选票可转给所选的第二或第三候选人）a system for electing representatives in which a person's vote can be given to their second or third choice if their first choice is defeated, or if their first choice wins with more votes than they need