我还没有掌握这辆车的刹车性能。

I haven't got the feel of the brakes in this car yet.

《牛津词典》

为获得最佳性能，开发人员必须掌握JDBC API，并利用诸如批处理和结果优化之类的特性。

For optimal performance, developers must master the JDBC API and exploit features such as batching and result optimizing.

youdao

现在，您已经掌握了处理UNIX网络性能问题的基本知识和技术。

You are now armed with some knowledge and techniques to deal with UNIX network performance.

youdao