词汇	Long time no see
释义	Long time no see. 好久不见。
随便看	excavation protection excavation quantities excavation retaining excavation retaining and protecting excavation roadway excavation robot excavations excavation scheme Excavation section excavation sequence excavation setting-out excavation setting-out surveying excavation shoring excavation sign excavation simulation excavation sinkage excavation slope excavation speed excavation-stability condition excavation stake excavation station with PBA technique excavation step excavation step by step excavation steps simulating excavation subsidence