The only way that one is going to be proficient in it is to invest significant time.

想要获益的唯一办法便是投入大量时间。

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NCLB mandated that 100 percent of students be proficient in reading and math by 2014.

NCLB法案要求到2014年时100%的学生在阅读和数学方面必须达到优秀。

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Sure, physicists have to be proficient in mathematics, but the main thing is to have that curiosity and drive.

当然,要精通数学,但最主要的是具备那样的好奇心和动机.

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Candidates must be proficient in reading and writing the language of instruction in the proposed country of study.

UNESCO: Sources

Do sons and daughters take turns doing certain chores so they both learn to be proficient in all household activities?

CNN: Why men should share equally in housework

But to be fully proficient at making an omelet from the leftovers in your fridge, you need to grasp the finer points of seasoning, timing and creative thinking.

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