obsolescence英语

过时guò shí（陈旧不合时宜） out-of-date; outmoded; obsolete; antiquated; out of fashion:过时的观念 antiquated ideas过时的设备 outmoded equipment这种武器早已过时。 This kind of weapon is obsolete.（错过规定的时间） past the appointed time:过时作废 null and void after a certain date