/ˈhʌbʌb ||; ˈhʌbʌb/noun [sing] [U]:
1 the noise made by a lot of people talking at the same time 嘈杂声；喧哗: I couldn't hear the announcement over the hubbub. 一片嘈杂声中，我听不见在宣布什么。
2 a situation in which there is a lot of noise, excitement and activity 喧闹: the hubbub of city life 城市生活的喧闹