New research says that those who can't seem to keep their inner monologues (独白) in are actually more likely to stay on task, remain 26 better and show improved perception capabilities. Not bad, really, for some extra muttering. 看来多喃喃自语几句还真不是什么坏事
What are you two muttering about? 你们两个在嘀咕些什么？
Some senators muttered darkly about the threat to national security. 一些参议员私下里谈论国家安全面临的威胁。
Workers continued to mutter about the management. 工人私下对资方还是有怨言。