VOA慢速英语:American Halloween Goes to the Dogs

costumes – n. clothes worn by someone in a different role  ​

pets – n. an animal (such as a dog, cat, bird, or fish) that people keep mainly for pleasure

mastiff – n. a type of large, powerful dog, once bred as a warrior

chihuahua – n. a very small dog with large ears and usually short hair originally from Mexico

characters – n. a person who appears in a story, book, play, movie or television show

celebrities – n. people who are famous

bow tie – n. a narrow length of cloth that is worn by men around the neck and tied into a bow at the throat

craze – n.  something that is very popular for a period of time

optimization – n. making something as good or as effective as possible