an aperture or gap, especially one allowing access.
she peered through one of the smaller openings
同义词：
holegapaperturespaceorificeventslotwindowcrackslitgashsplitfissureperforationcleftcrevicecutincisionrentcavitycrannygroovechinkeyemouthloopholepeepholejudasintersticespyholehiatusforamendoorwaygatewayportalwayentranceentryentrywaymeans of entryway inentréeaccessmeans of accessexitegressway out
they seem to have exploited fully the openings offered
同义词：
opportunitychancefavorable time/occasion/momentright set of circumstancesmomentoccasionwindow (of opportunity)possibilityturntimeinformal：breaklucky breakshot
