这个地区的基础设施相对薄弱。

Zhège dìqū de jīchǔ shèshī xiāngduì bòruò.

The infrastructure in this region is relatively weak.

这个项目的可持续性问题相对薄弱。

Zhège xiàngmù de kěchíxù xìng wèntí xiāngduì bòruò.

The sustainability of this project is relatively weak.

这家公司在管理方面比较薄弱，容易出现问题。

Zhè jiā gōngsī zài guǎnlǐ fāngmiàn bǐjiào bóruò, róngyì chūxiàn wèntí.

This company is relatively weak in management, so problems easily arise.