centring diphthong

例句：

1. 1. The city is the centre of the region's economy.
   这个城市是该地区经济的中心。
2. 2. He decided to focus on his studies rather than partying.
   他决定专注于学习而不是聚会。
3. 3. The project aims to be the centre of innovation in the industry.
   该项目旨在成为该行业的创新中心。