Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
origami –n. the Japanese art of folding paper into shapes that look like birds, animals and other things
tip –n. a piece of advice or useful information
audio –adj. of or relating to the sound that is heard on a recording or broadcast
fold –v. to bend one part of something over or against another part
fitted sheet –n. a piece of bedding cloth that has four corners, and sometimes two or four sides, fitted with elastic
introduce –v. to mention or refer to something for the first time
