unstable lubrication

例句：

1. 1. Theengine needs more oil to maintain its stability during operation.
   发动机在运行过程中需要更多的油来保持其稳定性。
2. 2. In the construction of a bridge, the use of unstable lubrication is crucial for preventing collapse.
   在建造桥梁的过程中，使用不稳定润滑对于防止坍塌至关重要。
3. 3. The engineer used an unstable lubrication technique to reduce friction and improve efficiency.
   工程师使用了不稳定润滑技术来减少摩擦并提高效率。