| 单词 | migration period |
| 释义 | > as lemmasMigration Period Migration Period n. (a) = Migration Age n.; (b) the part of the year during which an animal migrates. ΚΠ 1867 Michigan Univ. Mag. 2 130 History... In winter, continuation of modern history to the death of Charles V. Review of general history to the end of the migration period. 1907 H. M. Chadwick Orig. Eng. Nation vii. 188 We are not, I think,..justified in regarding the civilisation of the migration period as either rude or primitive. 1930 Ecology 11 571 Nymphs..proceed actively up-stream. The latest date upon which this has been observed is April 23, giving a migration period of about four weeks in this particular creek. 1931 Jrnl. Royal Anthropol. Inst. 61 479 The Polynesian sagas of the Migration Period. 1996 Ecol. Applic. 6 49 Between 100 and 500 individuals were counted on any observation day, and densities were usually highest during the spring and fall migration period. < as lemmas |
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