bubble
名词 bubble:
a hollow globule of gas (e.g., air or carbon dioxide)
a speculative scheme that depends on unstable factors that the planner cannot control
同义词:house of cards
an impracticable and illusory idea
a dome-shaped covering made of transparent glass or plastic
动词 bubble:
form, produce, or emit bubbles
flow in an irregular current with a bubbling noise
同义词:ripple, babble, guggle, burble, gurgle
expel gas from the stomach