A mistrial is a court trial that the judge stops because something went so wrong that the trial cannot fairly continue — or cannot fairly count. Then a new trial usually has to be held.

A mistrial mistrial（無效審判） is是 a court trial that the judge stops一場被法官中止的法庭審判， because something went so wrong that the trial cannot fairly continue — or cannot fairly count因為出了嚴重的問題，讓審判無法公平地繼續下去、或無法公平地算數。Then這樣一來 a new trial一場新的審判 usually has to be held通常就得重新舉行。

Typical reasons: the jury heard something they were not allowed to hear; a lawyer or a witness broke a serious rule; or the jury cannot agree (a hung jury), and the judge may declare a mistrial.

Typical reasons典型的原因有： the jury陪審團 heard something they were not allowed to hear聽到了不該聽到的東西； a lawyer or a witness律師或證人 broke a serious rule違反了重大規則； or或者 the jury cannot agree陪審團無法達成共識 (a hung jury)（懸而未決的陪審團）, and而 the judge法官 may declare a mistrial可能會宣布審判無效。

Though actually, losing a case is not a mistrial. “Unfair” here is a legal kind of unfair, not “I did not like the result.” Ordinary people meet the word on the news more than in daily talk. It belongs to courts, not to school tests or sports.

Though actually不過其實， losing a case輸掉官司 is not a mistrial並不是「審判無效」。“Unfair” here這裡的「不公平」 is是 a legal kind of unfair一種法律意義上的不公平， not “I did not like the result.”而不是「我不喜歡這個結果」的意思。Ordinary people一般人 meet the word比較常 on the news more than in daily talk是在新聞上遇到這個字，而不是在日常對話裡。It它 belongs to courts屬於法庭的用語， not to school tests or sports而不是學校考試或體育場合的用語。