保證人一個人或一個公司,對與質量、耐用性或性能相關的方面提供擔保、保證或誓約
One, such as a person or corporation, that makes or gives a promise, assurance, or pledge typically relating to quality, durability, or performance.
新汽車性能如何?
How is the new car performing?
汽車的可靠性比其機械性能更重要。
Performance is less important than reliability in a car.