Track 01
digital
(통신 등이) 디지털(방식)을 쓰는
invention
[C] 발명품, [U] 발명
bulky
물건이 부피가 큰[커서 옮기기 힘든]
technique
기법
coincidence
우연의 일치
worth
(금전 등의 면에서) …의 가치가 있는[되는]
barter
물물교환하다, 물건을 교환하다
trade
거래[교역/무역]하다
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