a substance capable of reducing friction by making surfaces smooth or slippery
双语例句
The performance of dry lubricants is improved by the preparation of the surfaces. 干润滑剂的性能是靠表面的处理来改善的。
Water-based lubricants such as KY Jelly are preferred, and can be bought at most supermarkets, or pharmacists. 避免使用石油基润滑剂，如凡士林或婴儿油，因为这可以削弱避孕套，以及增加的机会，它的分裂。
