1.contestant n.竞争者；参赛者
The hostess promised to give each contestant, a fair show in answering the questions.
主持人答应在回答问题时给每位竞赛者以公平的机会。
2.biologist n.生物学家
He is sure to be a biologist in the future.
他将来肯定能成为一名生物学家。
3.mammalian n.哺乳动物
The report is on mammalian thermoregulation.
那份报告是有关哺乳动物的体温调节。
4.photography n.摄影
Photography is her favourite pastime.
摄影是她喜爱的消遣。
5.restrict v.限制；约束
In a move to restrict imports, the government raised custom duties.
政府在限制进口的措施中提高了关税。
