VOA慢速英语:MLK Day: The Fight for a Holiday to Celebrate Peace

petition – n. a written document that people sign to show that they want a person or organization to do or change something

assert – v. to state (something) in a strong and definite way

commemoration – n. something (such as a special ceremony) that is intended to honor an important event or person from the past

signatures – n. a person's name written in that person's handwriting

boycott – v. to refuse to buy, use, or participate in (something) as a way of protesting

fellow – adj. used to describe people who belong to the same group or class or who share a situation, experience, etc.