要求我们中学毕业前掌握基础英语语法。
We are asked to grasp the elements of English grammar before we finish middle school.
面试前一定要用心掌握公司的情况。
在本系列的前两篇文章中，您已经掌握了一些基本概念。
In the first two articles in this series you mastered the basic concepts.
事实上，有些人的确掌握了证据：维京人无疑在1492年前很久就到达了北美洲。
Some in fact did have evidence: Vikings certainly reached North America long before 1492.
首相在会议前已全面地掌握了资料。
你能很好地掌握自己的时间，并且在期限前完成工作？
设计工作者在设计燃机进气系统产品前必须掌握其气动特性。
We must master its aerodynamics performance before finalizing the design of inlet system.
所有高层次的前10%的顶尖人士完全掌握着自我教育。
All high performance top 10 percent people take full responsibility for their own education.
在您能熟练掌握前请多加练习，否则很容易呛到。
Practice until you can do it easily, and without so much force that you choke.
在您能熟练掌握前请多加练习，否则很容易呛到。
Practice until you can do it easily, and without so much force that you choke.
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