sharpen ·verb (MAKE BETTER)
Definition: to make something better or stronger Level: C2
最近的变革加剧了航空公司之间的竞争。
Recent changes have ___sharpened competition between the airlines.
我希望这门课程能帮助我提升我的计算机技能。
I hope this course will help me ___sharpen my computer skills.
事实上，老师和教授给了我们拓宽知识、磨练批判性思维以及总体上培养心智和灵魂的机会。
In fact, teachers and professors give us the opportunity to broaden our knowledge, ___sharpen our critical thought and in general to cultivate our mind and soul.