a hubbub of voices的用法和样例：
- The square was a sea of people and a hubbub of voices bubbled up.
- I can imagine such scene that the security company is a hubbub of voices and the leader is checking the amount of goods and ready to start by standing in doorway.
- a hubbub of voices; a babel of voices
- a hubbub of voices; loud confused voices
- Only occasionally a hubbub of altercation rises to the skies.