r. without doubt; certainly
adv. 无疑, 必定, 确实地
1. She is undoubtedly the best player on the team.
她无疑是队里最优秀的球员。
2. This book is undoubtedly one of the greatest novels ever written.
这本书无疑是有史以来最伟大的小说之一。
3. He will undoubtedly succeed if he keeps working hard.
如果他继续努力工作,毫无疑问他会成功。