periodical cicada
短语un. 十七年蟑 [网络] 周期蝉；食的周期蝉
词形变化
periodical cicadas
复数
periodical cicadas
释义与例句
n.
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1.
Any of certain species of cicadas, especially in genus Magicicada, which are known for their 17- and 13-year life-cycles, during most of which they develop underground, emerging in large numbers for a short time as large and audible adults, all those emerging in a year constituting a brood.