我最近的研究是关于气候变化对城市基础设施的影响。

My recent research is ___concerned ___with the effects of climate change on urban infrastructure.

这本书的第二章主要讲述作者早期的哲学发展历程。

The second chapter of the book is primarily ___concerned ___with the author's early philosophical development.

本次研讨会旨在探讨可持续能源的创新方法。

This seminar is ___concerned ___with exploring innovative approaches to sustainable energy.