| Some of these engines pumped water, while even more burbled away on kero and did... something. |
| Some were caked with layer upon layer of old food, others burbled ominously with fresh unsavory indelicacies. |
| Instead, those participants had simply burbled on regardless. |
| The engine started, burbled away cheerfully for a while and then stopped. |
| He could have burbled on, said things he didn't mean to say, kept it going just for appearances. |
| And, as in uffish thought he stood, The Jabberwock, with eyes of flame, Came whiffling through the tulgey wood, And burbled as it came! |
