come to sb.'s aid

例句：

1. 1. Please come to my aid when I need it most.
   在我需要的时候请帮帮我。
2. 2. The doctor came to her aid when she fell ill.
   医生在她生病时来帮她。
3. 3. He offered his assistance in the construction of the bridge.
   他提供帮助建造这座桥。