period of time

名词 period of time:

1. an amount of time
   同义词：time period, period

1. A period of time during which a vehicle, person, or material suspected of carrying a contagious disease is detained at a port of entry under enforced isolation to prevent disease from entering a country.
   检疫期，隔离期当运输工具、人或材料被怀疑带有传染性疾病，被扣留在港口进行强行隔离的一段期限，以防止疾病传入某个国家
2. A period of time during which motor vehicular and pedestrian traffic is light.
   非交通高峰时间一段时间，在这段时间内车辆和行人都少
3. A period of time as reckoned from a specific date serving as the basis of its chronological system.
   年代从某一具体日期算起的一段时间，也用作其年代系统的根据
4. The period of time during which property, an object, a process, or a phenomenon exists or functions.
   存在期，有效期某种性质、物体、过程或现象存在或起作用的一段时间