VOA慢速英语:美国前总统全息图继续展出

three-dimensional – adj. having or seeming to have length, width, and depth

generate(d) – v.­ to produce something or cause something to be produced

stunning – adj. very surprising or shocking

formal – adj. requiring or using serious and proper clothes and manners

on display – n. put somewhere for people to see

seal of approval – n. an action or statement that shows approval or official acceptance

comforting – adj. causing someone to feel less worried, upset or frightened

twinkle in (his) eye – idm. a friendly or happy expression in someone's eye

grin – n. n expression on your face that makes the corners of your mouth turn up and that shows happiness, amusement, pleasure, or affection