单词	ear defender
释义	ear defender noun : a device (such as an earplug) designed to lessen the transmission of excessive or damaging sound to the auditory receptors of the inner ear Word History First Known Use 1915, in the meaning defined above
随便看	retouching retour retourable retoured retouring retours retrace retrace one's steps retraceability retraceable retraced retracement retracers retraces retracing retracing his footsteps retracing his steps retrack retracked retracking retracks retract retractabilities retractable retractation

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