| 单词 | 首例 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔horse〕They have got on their high horse. They're insisting on being the lead investigators because theirs was the first case.他们趾高气扬的。因为他们的是首例案件, 所以他们坚持要领头调查。外研社新世纪〔index case〕The earliest documented case of a disease included in an epidemiologic study.首例病例：传染病学中某种病症最早被记录下来的病例美国传统〔xenotransplant〕Doctors in Mississippi performed the world's first heart xenotransplant.密西西比的医生进行了世界上首例异种心脏移植手术。朗文当代 |
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