

The soup is bubbling, so turn down the heat.
[ðə ˈsup ˈɪz ˈbəbəlɪŋ, ˈsoʊ ˈtɜrn ˈdaʊn ðə ˈhit.]
The sauce bubbled over and made a mess everywhere.
[ðə ˈsɔs ˈbəbəld ˈoʊvər ənd ˈmeɪd ə ˈmɛs ˈɛvriˌwɛr.]
Don't let the milk bubble over on the stove.
[ˈdoʊnt ˈlɛt ðə ˈmɪlk ˈbəbəl ˈoʊvər ˈɔn ðə ˈstoʊv.]
"bubble" is in the lesson "Verbs 8" (Level 20), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.