我奶奶花了10年时间才得以熟练地制作纸艺术。
It took 10 years before my grandma could make paper art skillfully.
在相当于殷商时期，古代蜀人不仅掌握了高超的青铜铸造技术，而且也熟练地掌握了黄金的加工技艺，制作出了精美的金杖、金面罩等。
In the time equivalent to the Yin Shang Period, the Ancient Shu People not only mastered the high technology for bronze casting, but also skillfully mastered the technology for gold processing.
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