The local bus service was a poor substitute for their car.

他们坐当地的公交车，这比坐自己的汽车可差远了。

《牛津词典》

The proxy pattern is really nothing more than the creation of an object that represents or ACTS as a substitute for another real object that will eventually complete the call or perform the service.

实际上，代理模式无非是创建一个代表或充当另一个实际对象的替身的对象，另一个对象将最终将调用或执行服务。

youdao

This import will now refer to the export we created earlier and will ultimately let us use the custom mediation in that module, thus using the DateProvider as a substitute for an external service.

该导入现在将引用我们先前创建的导出，并最终让我们在模块中使用自定义中介，因而使用 DateProvider 作为外部服务的替代。

youdao

You can't completely pigeonhole Skype when it serves both as a partial substitute for traditional phone service and an instant messaging service with voice and video on top.

ENGADGET: France investigates Skype after it doesn't register as a telecom provider (update: Skype response)

Self-service is no substitute for savvy hiring.

FORBES: 5 Attributes of a World-Class Workforce

He questioned whether the ECPs would simply be a "substitute rather than a supplement" to the existing service.

BBC: NEWS | Health | No ambulance guarantee for 999s