有效期
duration of validity;time of efficacy; term(or period) of validity
在簽證～內(nèi)和入出境有效次數(shù)內(nèi)，他們可以自由進(jìn)出該國，而無須履行其他手續(xù)。They may come to or leave the country freely within the duration of the validity of the visa and the number of entry/exit granted without having to go through other procedures./本議定書自雙方簽字時(shí)起生效，～為8年，除非經(jīng)雙方同意延長。This Protocol shall enter into force upon signature by both Parties and remain in force for eight years,unless extended by mutual agreement./本護(hù)照前往世界各國，自發(fā)照之日起～5年。This passport is valid for travel to all countries in the world within a period of five years from the date of issue./在簽證～內(nèi)within the period of validity of the visa/延長合同的～prolong (or extend) the contract’s period of validity/本護(hù)照～延長至…The validity of this passport is extended to…/～為12個月valid for 12 months/藥品的～expiry(or expiration)date of medicine