1. The man blushed and mumbled an apology, then ignored the taunts until he got off several stops later.
2. " I could hardly stop It was so exciting, " the boy mumbled.
3. mumbled的意思
3. Zhang mumbled that " the cell phone owner was drunk and needed help " and asked Hao to meet them at an Internet cafe.
4. Some fans who were watching the TV monitors in private offices at the top of the stadium mumbled to themselves.