What is a fact? Is it something that people believe? No. A fact is anything that can be proved. For example, it can be proved that China has more people than any other country in the world. This is a fact.什么是事实？这是人们相信的吗？不，事实就是任何可以证明的东西。例如，可以证明中国的人口比世界上任何其他国家都多。这是事实。
Then what is an opinion? An opinion is what someone believes is true but has not been proved. So an opinion is not good evidence in a trial. For example, it is an opinion if you say "Cats are better pets than dogs". It may be true, but it is difficult to prove. Some people may not agree with this opinion but they also cannot prove that they are right.那么什么是观点呢？观点是指某人认为是真实的，但尚未被证明的观点。因此，在审判中，观点并不是好的证据。例如，如果你说“猫是比狗更好的宠物”，那就是一种观点。这可能是真的，但很难证明。有些人可能不同意这种观点，但他们也无法证明自己是对的。
In a trial, a judge must decide which eyewitnesses to believe and which not to believe. The judge does not consider what each eyewitness looks like or where that person lives or works. He/She only cares about whether the eyewitness has given true information, which must be facts rather than opinions. This kind of information is called evidence.在审判中，法官必须决定哪些目击者应该相信，哪些不应该相信。法官没有考虑每个目击者的长相，也没有考虑此人的生活或工作地点。他/她只关心目击者是否提供了真实的信息，这些信息必须是事实，而不是观点。这种信息被称为证据。