to stop a wall or a building from falling down by supporting it with building materials such as wood or metal

Boundary walls have had to be shored up. 边界墙须用支柱支撑。

to support or improve an organization, agreement, or system that is not working effectively or that is likely to fail

The new public relations manager has the difficult task of shoring up the company's troubled image. 新任公关经理面临改善公司不良形象的艰巨任务。