保证人一个人或一个公司，对与质量、耐用性或性能相关的方面提供担保、保证或誓约 One, such as a person or corporation, that makes or gives a promise, assurance, or pledge typically relating to quality, durability, or performance.
新汽车性能如何？ How is the new car performing?
汽车的可靠性比其机械性能更重要。 Performance is less important than reliability in a car.
