gap depth

例句：

1. 1. The gap between the two countries is widening.
   两国之间的差距正在扩大。
2. 2.The engineer measured the gap depth of the bridge.
   工程师测量了桥梁的间隙深度。
3. 3. The gap depth of the soil can affect the stability of the foundation.
   土壤的间隙深度会影响地基的稳定性。