这个笨手笨脚的人连拿咖啡杯都会打翻。

The ___clumsy person spilled his coffee just by picking up the cup.

面试时他紧张得结结巴巴，完全变成了一个语无伦次的人。

During the interview, he got so nervous that he became a ___fumbler, stumbling over his words.