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capsule – n. a small container
contract – n. a business agreement
elevator — n. a machine used for carrying people and things to different levels in a building
ladder – n. a structure used for climbing up or down something
efficiency – n. the ability to do something or produce something without wasting materials, time, or energy; the quality of being efficient
cargo – n. something that is carried from one place to another by boat or airplane
participate – v. to be involved with others in doing something; to take part in an activity or event with others
excite – v. to cause strong feelings or interest
