VOA慢速英语:Trump Donates First Paycheck to National Park Service

salary - n. an amount of money that an employee is paid each year​

charity​ - n.​ an organization that helps people who are poor, sick, etc.​

appreciation​ - n.​ a feeling of being grateful for something​

warrior​ - n.​ a person who fights in battles and is known for having courage and skill​

defer - v. to choose to do (something) at a later time

maintenance - n. the act of keeping property or equipment in good condition by making repairs, correcting problems, etc.