"his proposal was nothing but a house of cards" "a real estate bubble"
"he didn't want to burst the newcomer's bubble"
"The soup was bubbling"
"babbling brooks"
"bubble to the surface"
"bubble gas through a liquid"
"In China it is polite to burp at the table"
In 1837 he lost some money by speculating in one of the many bubble companies of that year.
Yon swoll'n brook that bubbles fast.
Wild thoughts bubbled within her.
The silver bubbling of a thrush.
A spring comes bubbling up there.
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)