n.

1. 冲击，撞击，碰撞[U]
   The impact of the stone against the windowpane shattered the glass.

   石头撞击窗户打碎了玻璃。

2. 冲击力，撞击力[U]
3. 影响；作用[S1][（+on）]
   The book made a great impact on its readers.

   这本书对读者有很大的影响。

vt.

1. 压紧；挤满
   The war impacted the area with refugees.

   战争使那个地区挤满难民。

2. 冲击，撞击，碰撞
3. 对……产生影响

vi.

1. 冲击，撞击，碰撞
2. 产生影响[（+on）]
   It is obvious how bad movies will impact on children.

   坏电影对儿童会产生什么影响是显而易见的。

n.

1. the action of one object coming forcibly into contact with another.
2. a marked effect or influence.

v.

1. come into forcible contact with another object.
   ▸chiefly N. Amer. come into forcible contact with.
2. (often impact on) have a strong effect.
3. press firmly.