VOA慢速英语:欧盟法院取消与美国的数据共享协议

invalidate –v. to make something invalid or to cancel its effect

vet –v. to investigate to find out if someone or something meets certain requirements

surveillance –n. observing someone or something, especially for security purposes

revelations –n. something that is made known that was surprising or secret before

valid –adj. something that meets legal requirements

underpin –n. to support something from below, to provide a basis