He bumbled through his speech .

他结结巴巴地讲完了他的演说。

He somehow bumbled through two years of college .

他胡乱地混过了两年大学生活。

The old man bumbled into the room .

老人踉跄地进入房间.

The ancient empire was crushed and bumbled into the dust .

这个古老的帝国被摧毁，遭到了奇耻大辱。