单词	pitch point
释义	pitch point noun : the point of contact of the pitch lines of two gears or of a rack and pinion when in mesh Word History Etymology pitch entry 4
随便看	breathes (out) breathes out breathier breathiest breathily breathiness breathinesses breathing breathing (out) breathing capacity breathing mark breathing out breathing space breathing tube breathing tubes breathing valve breathingly breathings breathless breathlesslier breathlessliest breathlessly breathlessness breathlessnesses breaths

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