保證人一個人或一個公司，對與質(zhì)量、耐用性或性能相關(guān)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.
