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。