1 . 平均壽命
African - American women are another group of low expectancybecause of their high rates of obesity ., 由于非裔美國女性高比例的肥胖現(xiàn)象 , 她們是平均壽命低的另一人群.
2 . 預(yù)期壽命
the health expectancyof the oldest old in china ., 中國高齡老人健康預(yù)期壽命的研究.
3 . 場期待
field expectancy場期待field
4 . 預(yù)期數(shù)額
外研英語單詞 ... index n. 指數(shù) expectancyn. 預(yù)期數(shù)額 household n. 一家人;家庭.