单词	health span
释义	health span noun : the length of time in one's life during which an individual is in reasonably good health A revolutionary increase in life span has already occurred. A corresponding increase in health span, the maintenance of full function as nearly as possible to the end of life, should be the next gerontological goal. John W. Rowe and Robert L. Kahn Several genetic studies in mice suggest that the elimination of senescent cells from the organism leads to extension of the mouse's health span and lifespan. Judy Siegel-Itzkovich Word History First Known Use 1931, in the meaning defined above
随便看	half again as much as half again as much/many as half an eye half an hour half as big as half as big/much/good as half as good as half as many again as half as much again as half as much as half as much/many again as half asleep half aunt half bat half bath half baths half binding half bishop half bloods half board half bog soil half boot half brother half cadence half cent

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