单词	ball cock
释义	ball cock noun : an automatic valve whose opening and closing are controlled by a hollow float at the end of a lever Word History First Known Use 1734, in the meaning defined above
随便看	prettyish prettyism prettyisms pretype pretyped pretypes pretypify pretyping pretzel pretzels preumbonal preunification preunions preunited preunites preuniting preuniversity preussen preussens preux preux chevalier prev prevail prevail (on or upon) prevail (over)

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