weak surrounding rock

例句：

1. 1. The engineer carefully examined the weak surrounding rock before starting the excavation.
   工程师在开始挖掘之前仔细检查了弱的围岩。
2. 2.The weak surrounding rock was prone to collapse during heavy rains.
   弱的围岩在大雨中容易崩塌。
3. 3. The geologist used a remote sensor to detect the weak surrounding rock that might be causing the earthquake.
   地质学家使用远程传感器检测可能导致地震的弱的围岩。