任何时候使用公钥，您都可以确信关联的私钥确实保存在您使用其公钥的对方手里。
Any time you use a public key, you can be sure that the associated private key is indeed owned by the subject whose private key you are using.
作者写道：“广告商必须确信他们广告中的名人确实应该得到他们的地位。”
"Advertisers should make sure that the celebrities they want to use in their ads actually deserve their status," the authors write.
确实，土耳其已经为世界上该地区的稳定和进步作出了积极的贡献，我确信它将成为欧洲的一个重要贡献者。
Indeed, Turkey has already been making a positive contribution to stability and progress in this region of the world, and I know it will be a big contributor in Europe.
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