a sum of money
一笔───A stroke;钱───money
He gave the cat a stroke.───他抚摩了一下猫。
Her idea was a stroke of genius.───她的主意是聪明的一着。
Your idea was a stroke of genius.───你的主意很高明。
He made a stroke with the machete and the impact snapped it out of his hand.───他一刀砍下去，砰的一声，把刀子都震飞了。
She achieved this by telling the story of her own grandmother, who suffered a stroke and was unable to speak.───她通过讲述她自己祖母的故事来教育这些年轻员工，她祖母中风以后就再也不能说话了。
When his wife died of a stroke in her sixties, the 72-year-old retired professor was overwhelmed by grief.───老伴六十多岁时中风去世时，那位72岁的退休教授不胜悲痛。
Her idea was a stroke of genius.
By a stroke of good fortune, Steven was still in his office.
By a stroke of fortune, he won the competition.
A stroke paralyzed half his face.
When her husband had a stroke, she was given virtual control of the business.