be proficient in
英 美
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。
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。
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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