numismatist n. 錢幣學家，錢幣收藏家
scientist n.(自然)科學家
例句：
A nurse anesthetist unearthed a nest.
一名護理麻醉師掘出一套器具。
She was unconscious after being injected by the anesthetist.
麻醉師給她注射了一針后，她就失去知覺了。
She has great potential as an artist.
她很有潛質(zhì)，是一位可造就的藝術家。
Whoever made this cake is a real artist.
制作這個蛋糕的人真是個藝術大師。
The artist has caught her smile perfectly.
藝術家惟妙惟肖地畫出了她的微笑。
He keeps putting off going to the dentist.
他把看牙醫(yī)的事一拖再拖。
She made periodical visits to her dentist.
她定期去看牙醫(yī)。
You should visit your dentist at least twice a year.
你應該每年至少去看兩次牙科醫(yī)生。