Although lubricating fluid is present , conditions of operation do not permit complete surface separation and some asperity contact will occur .
虽然目前液体润滑油在运行的过程中不能完全实现的金属表面分离,一些严重的摩擦还是会出现。
But here he was set right by mrs. bennet , who assured him with some asperity that they were very well able to keep a good cook , and that her daughters had nothing to do in the kitchen .