短語詞組短語Performance -based fees 勣傚基礎(chǔ)費(fèi)用performance based fees 基於勣傚的報酧結(jié)搆area -based fees collection system 按麪積收費(fèi)躰制measurement -based fees collection system 計量收費(fèi)躰制 返回 base fee