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| 单词 | age structure |
| 释义 | > as lemmasage structure age structure n. ΚΠ 1888 Publ. Amer. Econ. Assoc. 3 33 If the deaths occurred in regular proportions from year to year, the age structure of a population might be represented by an equilateral triangle. 1965 Math. in Biol. & Med. (Med. Res. Council) iii. 101 Otherwise the differences between the groups would have reflected to some extent merely the differing age-structures of the various populations. 2003 Independent 8 Oct. 17/2 The age structure of the..developed nations. < as lemmas |
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