1·They have never mastered fire nor progressed.
"它们从来没有掌握过火的使用，也不存在任何进展。
2·I've completely mastered the use of all the words I've learned.
学过的词汇我全部掌握了。
—— 《新英汉大辞典》
3·On a societal level, one could even imagine that a lack of conversational flow may hamper the integration of immigrants who have not completely mastered the language of their new country yet.
在社会层面上，人们甚至可以想象，缺乏交流可能会阻碍尚未完全掌握新国家语言的移民们融入社会。
4·Grable has mastered the interdisciplinary approach to teaching that we've been talking about in class.
格拉布尔已经掌握了我们在课堂上讨论过的跨学科教学方法。
5·All this presupposes one essential detail, says Atholl Anderson, professor of prehistory at the Australian National University: the Lapita had mastered the advanced art of sailing against the wind.
澳大利亚国立大学的史前学教授阿索尔·安德森表示，这一切都以一个重要的细节为前提：拉皮塔人已经掌握了逆风航行的高级艺术。
1·He mastered electrical engineering. Also he knew some elementary exercises for the piano.
他精通电学工程，还知道一些基本的钢琴练习。
2·Machado DE Assis, born in 1839, of mixed race, epileptic, a stammerer, who, despite early poverty, mastered French and English, translated Shakespeare and poured out stories, novels and poetry.
马查多生于1839年，混血儿，患有癫痫和口吃，早年生活贫困，精通法语和英语，曾将莎士比亚的作品翻译成本国语言，并著有大量小说和诗歌。
3·It's true that you don't enjoy something until you've mastered it and practice makes perfect.
不错，只有精通了一样东西，通过练习臻于完美境界时你才能真正享受到它带来的乐趣。
4·There's no question these are all important skills to have, but at the same time they're also skills that with practice can be learned and mastered.
毫无疑问这些都是重要技能，但同时它们也是一些能通过实践学习到并且精通的技能。
5·I've been learning (but haven't mastered) the principles of Effortless Decision-Making.
我已经学习了(但还没有精通)轻松制定决策的原理。