最佳等级 [网络] best in class; [例句]在最佳工艺条件下,拒水等级可达到10级,拒油等级可达到7级。Under optimum processing condition, we obtain a 10th grade in water proofing and a 7th in oil proofing rate.
The best grade
the best grade
Top rankT.R.为什么要缩写呢