慢速英语:Immigrants Become Citizens at U.S. National Park

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breathtaking - adj. very exciting​

incredible - adj. extremely good, great, or large

civics - n. the study of the rights and duties of citizens and of how government works

character - n. the way someone thinks, feels, and behaves : someone's personality

verify - v. to prove, show, find out, or state that (something) is true or correct

rigorous - adj. very strict and demanding

relieved - adj. feeling relaxed and happy because something difficult has been stopped, avoided, or made easier

relaxed - adj. calm and free from stress, worry, or anxiety

overwhelming - adj. very strong in emotion

down the train - expression. spoiled or wasted

smooth - adj. happening or done without any problems

register - v. to put your name on an official list​ (to be able to vote)