earth-rockfill dam with central core

例句：

1. 1.The earth-rockfill dam is a marvel of modern engineering.
   这个以岩石填充的地坝是现代工程的奇迹。
2. 2.The central core of the dam provides a stable foundation for the structure.
   大坝的中央核心为结构提供了稳定的基座。
3. 3.The construction of this dam was a significant achievement in the field of hydropower engineering.
   建造这座大坝在水电工程领域是一个重大的成就。