| 释义 | break-in I. \ˈ ̷ ̷ˌ ̷ ̷\ noun
 (-s)
 Etymology: break in
 1.  : the act or action of breaking in
 2.  : a hole in brickwork to receive the end of a timber, a plug, or other member
 3.  : a preliminary performance or series of performances serving as a trial run
 4.  : break II 3c
 II. adjective
 : of or relating to a system or arrangement in which an automatic device permits the transmitting radio operator to receive incoming signals in intervals between his own transmitted signals
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