Definition: to make something as good as it can be Level: C2
我花了几个小时完善我的演讲。
I've spent hours ___perfecting my speech.
相反，重要的是他们在完善技能方面能走多远。
Instead, it matters how far they get with ___perfecting their skills.
团队在发布前努力完善设计。
The team worked hard to ___perfect the design before the launch.
