平分法 point-allotting method: 配點(diǎn)法number of periods: 期數(shù)method of periods: 定期平分法allotting: 取位選擇; 預(yù)分配; 預(yù)選expected life periods method: 使用期數(shù)比率法下載手機(jī)詞典可隨時隨地查詞查翻譯