backpack – n. a bag for carrying things that has two shoulder straps and is carried on the back

strap – n. a narrow and usually flat piece of a material that is used for fastening, holding together, or wrapping something

revive – v. to make (someone or something) strong, healthy, or active again

confident – adj. having a feeling or belief that you can do something well or succeed at something : having confidence

acrobatic – adj. used to describe a difficult and dangerous act

skiing – n. the sport of sliding and jumping on skis
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