Stability is one reason poured concrete walls work where other types won't.
灌浇混凝土墙的稳定性是其他类型的墙无法发挥作用的原因之一。
2
Poured concrete retains walls work well in the heavy or unstable soil and steep slopes, making other walls inadvisable.
在重质或不稳定的土壤和陡峭的斜坡上，浇注混凝土挡土墙效果良好，让其他墙成为不明智的选择。
3
In theory, the Army could use such a system to approach targets covertly and drill through concrete, steel, wood, or other materials from a stand-off distance equal to the length of a football field.