Yet they find themselves stumblingon simple tasks, all because they do not have the foundation necessary to fully understand or utilize the framework.
然而，他们发现在完成简单任务时就磕磕绊绊，这都是因为没有必要的基础知识来完全理解和使用框架。
2
To draw up its questions, Somerville turned to a neighbor, Daniel Gilbert, a Harvard psychology professor who wrote the 2006 best seller "Stumblingon Happiness."
The exhausted horse did not respond to the whip or REINS but shambled on, dragging his feet, stumblingon small rocks and swaying as if ready to fall to his knees.