经过几个月的努力，他终于掌握了编程技巧。

After months of hard work, he finally ___mastered the programming skills.

她通过不断练习终于克服了游泳的恐惧。

She finally ___mastered her fear of swimming through constant practice.

这张单曲经过专业母带工程师处理后，最终版本听起来非常棒。

The final version of this single sounds amazing after being ___mastered by a professional sound engineer.