sea floor spreading

例句：

1. 1. The oceanfloor spreading is a natural process that causesthe Earth's crust to move andchange over time.
   海底扩张是一种自然过程，导致地球的地壳随着时间的推移而移动和改变。
2. 2. This theory suggests that the seafloor spreading could be responsible for the formationof new continents.
   这一理论表明，海底扩张可能是形成新大陆的原因。
3. 3. The studyof sea floor spreading has provided valuable insightsinto the geological processes that shape ourplanet.
   对海底扩张的研究为我们提供了宝贵的见解，揭示了塑造我们星球的地质过程。