He spent more time perfecting his dance moves instead of gym work.

他用更多的时间来完善他的舞蹈动作而不是健身。

As a musician, she has spent years perfecting her technique.

身为音乐家，她多年来不断在技艺上精益求精。

He wanted to build institutions that would be used for the sole purpose of perfecting the slave into the perfect worker.

他想建立一种制度，这种制度的唯一目的就是让奴隶成为完美的工人。

Moreover, perfecting stealth technology takes time.

此外，完善隐形技术需要时间。

The iPad needed announcing and then last-minute perfecting.

iPad需要一个完美的问世。