When you are in court, you will need to prove the adultery by a "preponderance of the evidence." This is the type of evidence that tends to prove the matter you are asserting. In general, this means that you must convince the judge that the adultery more likely than not took place (i.e., 51%). In court, your spouse has the right to not incriminate herself, which means she may not have to testify in court. Also, the court will not infer any bad behavior if your spouse chooses not to testify. Therefore, do not rely on your spouse's potential testimony to prove a case of adultery. If you have received help from friends, family, or private investigators, you will want them to testify in open court. When this happens, they will testify to what they themselves saw that made them believe that adultery was occurring. Apart from asking people to testify, you can also submit records into evidence. To do so, you will need to follow the rules of evidence in your state. If a piece of evidence is admissible, you will be able to show it to the judge and use it as proof of adultery.

===
Write a summary of the previous text in Chinese:
要清楚什么是有效证据。 要知道你的配偶不必出庭作证。 找证人作证。 提交作为证据的记录信息。