n. 冠状病毒；日冕形病毒（coronavirus 的复数形式）
1.Since the outbreak of severe acute respiratory syndrome in several regions of the world in2003, the research on coronaviruses has become the focus of virology.
2003年，全世界多个国家和地区暴发了重症急性呼吸系统综合征，这也使冠状病毒的研究成为病毒学领域中最为关注的问题。
2.Since the outbreak of severe acute respiratory syndrome in several regions of the world in2003, the research on coronaviruses has become the focus of virology.
2003年，全世界多个国家和地区暴发了重症急性呼吸系统综合征，这也使冠状病毒的研究成为病毒学领域中最为关注的问题。