/ˈsɜ:tnli ||; ˈsɝtṇlɪ/adv1 without doubt; definitely 无疑；必然: The number of students will certainly increase after 2001. 2001年后学生人数必然增加。
2 (used in answer to questions) of course （用于回答问题）当然: ‘Do you think I could borrow your notes?’ ‘Certainly.’ “你的笔记可以借我吗？”“当然可以。”