单词	Galton whistle
释义	Galton whistle noun : a whistle of variable high pitch used to test the upper limit of audibility Word History Etymology after Sir Francis Galton, its inventor
随便看	dotal dotant dotard dotards dotations dote dote (on) dote on dote on/upon dote upon doted doted (on) doted on doted upon doter doters dotes dotes (on) dotes on dotes upon doth Dothan dother Dothideaceae dothideaceous

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