慢速英语:研究称新机器能使肝脏在体外存活整整一周

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function – n. the purpose of something

transplant – n. an operation in which an organ or tissue is transplanted

unique – adj. different from everything else

pave the way - idiom to make it easier for something to happen

graft – n. piece of healthy skin or bone cut from a person's own body and used to repair a damaged part on that person

range – n. group of different things of the same general type