For five years, it worked on building its user base and perfecting its product, resisting pleas from venture capitalists to figure out how to make money.
它用五年时间培育自己的用户群，完善自己的产品，在风险投资对他们如何赚钱指手画脚时顶住压力。
At the start of the 1800s, a new artillery shell appeared on the battlefields of Europe. It was the brainchild of an English officer who had spent 30 years perfecting it.
十九世纪初，欧洲战场上出现了一种新炮弹，那是英国一名军官发明的，花了他三十年研制，精益求精。
Discussion with others is a good way to pool collective wisdom. Study and discussion can serve to remove the defects in a works, perfecting it and making it produce better results.
互相探讨是集思广益的好办法，一个作品经过大家研究和讨论，是会更臻完善、收效更大和不易发生毛病的。
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