VOA慢速英语:Roller Coaster Rides Can Help With Painful Condition

curious – adj. having a desire to learn or know more about something or someone

theme park – n. an amusement park where the rides and attractions are based on a particular theme

3-dimensional – adj. An object that has height, width and depth, like any object in the real world.

hollow – adj. having nothing inside : not solid

factor – n. something that helps produce or influence a result : one of the things that cause something to happen

variable – n. something that changes or that can be changed : something that varies

pilot – adj. done as a test to see if a larger program, study, etc., should be done

rough – adj. having or causing sudden, violent movements

ideal – adj. exactly right for a particular purpose, situation, or person

remnant – n. the part of something that is left when the other parts are gone

heed – v. to pay attention to (advice, a warning, etc.)

alternative – adj. offering or expressing a choice