septemdecimal 的意思
十七年的;每十七年发生一次的
septemdecimal 的词源
septemdecimal(adj.)
“十七年蝉”,1855年,这个词最初通常是指蝉,源自拉丁语 septemdecim,意为“十七”(参见 seven,ten),加上 -al(1)。相关词汇有 Septemdecimally。Septemdecenary,意为“每十七年出现一次”,同样指蝉,最早见于1843年(出自威廉·柯比和威廉·斯宾塞的《昆虫学导论》,这本书涉及词源和昆虫学的交叉)。
They never descend very deeply into the earth, but remain about the tender fibres of the roots. The only change they appear to undergo in their subterranean pilgrimage of seventeen long years is increase of size. As the time of their transformation approaches, they rise to near the surface of the earth, form cemented cells, in which they pass their pupa state, after which they burst the skin on the back and ascend the first tree, and again perform their septemdecimal offices of generation. [John Hooper, report on the seventeen-year locust, in "Annual Report of the American Institute," New York, 1855]
它们从不深入地下,而是停留在根部的嫩纤维附近。在这漫长的十七年地下旅程中,它们似乎唯一的变化就是体型的增长。随着变身时刻的临近,它们会升至接近地表,形成水泥状的蛹室,在那里度过蛹期。之后,它们会撕裂背部的外壳,爬上第一棵树,再次进行它们的繁殖仪式。[约翰·胡普,关于十七年蝉的报告,发表于《美国学会年报》,纽约,1855年]
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