n. the sound made by a sharp swift blow
v. hit hard
vt. 猛击, 重打, 削减
vi. 重击
n. 重击, 重打
1. She gave the ball a good whack and it flew across the field.
她用力打了球，球飞过了整个球场。
2. The teacher whacked the desk to get the students' attention.
老师敲了敲桌子以吸引学生的注意。
3. He felt a whack on his back when his friend playfully hit him.
当他的朋友开玩笑地打了他时，他感到背部被猛击了一下。