accretion theory

例句：

1. 1. The accretion theory suggests that the Earth's crust is constantly being added to by volcanic activity.
   积累理论认为，地球的地壳是由火山活动不断添加的。
2. 2. The accretion theory has been widely accepted as a scientific explanation for the origin of life on Earth.
   积累理论被广泛接受为解释地球上生命起源的一种科学解释。
3. 3. The accretion theory posits that the formation of the solar system began with the collision and merger of smallercelestial bodies.
   积累理论主张太阳系的形成始于较小天体的碰撞和融合。