alumnus
n.男毕业生，男校友
playwright
n.剧作家
Shakespeare is a famous playwright.
莎士比亚是一位著名的剧作家。
mathematician
n.数学家
astronomer
n.天文学家
botanist
n.植物学家
geographer
n.地理学者
geologist
n.地质学者
meteorologist
n.气象学者
archeologist
n.考古学家
artist
n.艺术家，画家
As an artist, one should be sensitive to colors.
艺术家应该对颜色敏感。
artisan
n.工匠，技工(craftsman)
inventor
n.发明家
Edison is the greatest inventor in the human history.
爱迪生是人类历史上最伟大的发明家。
biographer
n.传记作者
Boswell was the biographer of Dr. Johnson.
鲍斯威尔是约翰逊博士的传记作者。
ecologist
n.生态学者
critic
n.批评家，评论家；吹毛求疵者
He is a film critic and he writes reviews for books on film.
他是影评人，为电影写书评。
connoisseur
n.(艺术品的)鉴赏家，鉴定家；内行
He is a connoisseur of fine wines.
他是上等葡萄酒的鉴赏家。
commentator
n.评论员，讲解员(reviewer, analyst)
counsel
n.辩护人,律师,法律顾问
As a legal counsel, he provides legal advice to many companies.
作为法律顾问，他为许多公司提供法律咨询。