| 单词 | helicon |
| 例句 | The pitch of the helicon is an octave below that of the euphonium. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z The helicons are bold insects, and did not seem to mind our close inspecting eyes. The Sea and the Jungle 2011-08-30T02:00:30.350Z For military purposes, this and the contrabass—the helicon—are circular. Scientific American Supplement No. 819, September 12, 1891 As we bumped by the huts the helicons and swallow tails rose precipitously from the mangled cans and cast rubbish. The Sea and the Jungle 2011-08-30T02:00:30.350Z |
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