ocean floor spreading

基本解释

The sea floor is spreading away from the mid-ocean ridges.
海底正在从大洋中脊扩张开来。
This is part of the system of mid-ocean ridges that form as the tectonic plates of the Earth’s crust move apart—a process known as sea floor spreading.
印度洋脊是中大洋脊的一部分，中大洋脊是地壳分离的地球板块形成的。这一形成过程被称为海底扩张。
This is part of the system of mid-ocean ridges that form as the tectonic plates of the Earth's crust move apart—a process known as sea floor spreading.
那里是海洋中脊系统中的一部分，而大洋中脊形成于板块漂移与海床扩展。