她轻轻地把咖啡粉压实，以确保萃取均匀。

She gently ___tamps the coffee grounds to ensure even extraction.

他习惯在抽前把烟草压实到烟斗里。

He always ___tamps down the tobacco into his pipe before smoking.

老师试图平息教室里激动的讨论。

The teacher tried to ___tamp down the excited discussion in the classroom.