noun · a period of time during which something is lacking, such as a job, a romantic relationship, or production

他在简历中解释了自己由于旅行而产生的职业空窗期。

noun · the time interval between initial infection and the point when antibodies become detectable by testing

处于艾滋病病毒空窗期的人，虽然检测呈阴性，但仍具有传染性。