名詞 period of time:

1. an amount of time
   同義詞：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.
   檢疫期，隔離期當(dāng)運(yùn)輸工具、人或材料被懷疑帶有傳染性疾病，被扣留在港口進(jìn)行強(qiáng)行隔離的一段期限，以防止疾病傳入某個(gè)國(guó)家
2. A period of time during which motor vehicular and pedestrian traffic is light.
   非交通高峰時(shí)間一段時(shí)間，在這段時(shí)間內(nèi)車(chē)輛和行人都少
3. A period of time as reckoned from a specific date serving as the basis of its chronological system.
   年代從某一具體日期算起的一段時(shí)間，也用作其年代系統(tǒng)的根據(jù)
4. The period of time during which property, an object, a process, or a phenomenon exists or functions.
   存在期，有效期某種性質(zhì)、物體、過(guò)程或現(xiàn)象存在或起作用的一段時(shí)間