As for foreigners travelling to the U.S., if they wish to enter U.S. visa-free under the Visa Waiver Program (VWP), they are now required to possess machine-readable passports that comply with international standards.
当外国人旅行到美国时，如果他们希望根据 免签证计划（VWP）免签证进入美国，现在他们就需持有符合国际标准的可机读护照。