| 单词 | replacement level |
| 释义 | > as lemmasreplacement level replacement level n. the level necessary to ensure or enable replacement (esp. of population). ΚΠ 1892 Manch. Guardian 30 June 6/4 More sales are reported of goods on the spot, but reductions were being forced, and prices had fallen below replacement level. 1960 G. A. Kelly Overpopulation i. 21 Population growth will then come to an end and if fertility has fallen below replacement level there may be net losses of numbers. 2003 Sci. Amer. Sept. 22/2 The ‘baby bust’ of the 1960s and 1970s, which brought births below the replacement level of 2.11 births per woman for the first time in recorded history. < as lemmas |
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