These are just little things that can add up, so you just want to make sure you're on top of those.

这些小事情也会影响到你的总分，因此务必熟练掌握。

麻省理工公开课 - 化学原理课程节选

So it really, you know, becoming familiar with the different methods is best done through experience, not through books.

所以，真的，你知道，熟练掌握不同的方法最好是通过经验，而不是通过书。

迷上网页设计 - SpeakingMax英语口语达人

You're saying I want that. Is that right, John?

你们熟练掌握了这一点，你的意思是？

麻省理工公开课 - 计算机科学及编程导论课程节选

Physicians over the years of having this instrument have learned how to be very sophisticated about looking at these pictures and diagnosing when something is wrong inside the chest, for example.

这些年来,使用这类设备的医生,已经熟练地掌握了,通过看这些X光片,来诊断,胸部疾病的方法

耶鲁公开课 - 生物医学工程探索课程节选