professional paper

例句：

1. 1.She spent hours researching and writing herprofessional paper.
   她花了很多小时研究和撰写她的专业论文。
2. 2. The professor gave us a detailedlecture on the importance of professional papers inacademic research.
   教授给我们详细讲解了专业论文在学术研究中的重要性。
3. 3. The student's excellent performance inthe competition earned him a spoton the team for his professional paper.
   这位学生在比赛中的出色表现使他获得了团队中的一员，因为他的专业论文表现出色。