mouthing words 默念
mouthing off 顶嘴
lip mouthing 唇语
A: Can you hear her? She's not making any sound.
A：你能听到她吗？她一点声音都没发。
B: No, she is just mouthing the words.
B：没有，她只是在用嘴型比划单词。
1) 默念或用嘴型模仿说话
2) 将东西放入嘴里
3) 顶嘴（多用于mouthing off）
1. 默念；用嘴型说话
2. 把……放入嘴里
present participle / noun
1. The act of forming words with the lips without making sound, or the act of putting something into the mouth.
Synonym: lip-syncing