underlying shaft

例句：

1. 1. The engineer useda sophisticated underlyin g shaft tosupport the building's weight.
   工程师使用一个复杂的地下轴来支撑建筑物的重量。
2. 2. Theconstruction crew had to dig deeper to findthe underlying shaft.
   施工队伍不得不挖得更深才能找到地下轴。
3. 3. The undergroundshaft was used as astorage facility for the company's resources.
   这个地下轴被用作公司资源的存储设施。