numismatist n. 錢(qián)幣學(xué)家，錢(qián)幣收藏家
scientist n.(自然)科學(xué)家
例句：
A nurse anesthetist unearthed a nest.
一名護(hù)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(jué)了。
She has great potential as an artist.
她很有潛質(zhì)，是一位可造就的.藝術(shù)家。
Whoever made this cake is a real artist.
制作這個(gè)蛋糕的人真是個(gè)藝術(shù)大師。
The artist has caught her smile perfectly.
藝術(shù)家惟妙惟肖地畫(huà)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(yīng)該每年至少去看兩次牙科醫(yī)生。