以下是使用"powerful"的句子：
"He knocked down his opponent with a powerful left hook."
"Powerful business interests are influencing the government's actions."
"The elephant grinds its food with powerful molars."
"You need a powerful saw to cut through metal."
"An immensely powerful organization exercises a huge influence."
"A rich and powerful man wields influence and wealth."
"Only the intervention of powerful friends obtained her release."
"Powerful weapons are designed for maximum impact."
"A powerful engine delivers strong performance."
"A powerful voice can carry far and wide."