1. 實情;真相;事實
    The truth about something is all the facts about it, rather than things that are imagined or invented.

    e.g. Is it possible to separate truth from fiction?…
           有可能把事實與虛構分開嗎？
    e.g. I must tell you the truth about this business...
           我必須告訴你這件事的真相。

2. 真實性;真實
    If you say that there is some truth in a statement or story, you mean that it is true, or at least partly true.

    e.g. There is no truth in this story...
           這個故事純屬虛構。
    e.g. Is there any truth to the rumors?...
           那些謠言有什么事實依據(jù)嗎？

3. 真理
    A truth is something that is believed to be true.

    e.g. It is an almost universal truth that the more we are promoted in a job, the less we actually exercise the skills we initially used to perform it.
           這幾乎是一條普遍的真理：我們在某一工作中越往上晉升，實際運用那些當初在工作中經(jīng)常實踐的技能的機會就越少。

4. see also: home truth;moment of truth

5. 實際上;事實上
    You say in truth in order to indicate that you are giving your honest opinion about something.

    e.g. In truth, we were both unhappy.
           事實上，我們倆都不快樂。

6. 說實在的;坦白說
    You say to tell you the truth or truth to tell in order to indicate that you are telling someone something in an open and honest way, without trying to hide anything.

    e.g. To tell you the truth, I was afraid to see him...
           坦白說，我害怕見他。
    e.g. Truth to tell, John did not want Veronica at his wedding.
           說實在的，約翰不想韋羅妮卡參加他的婚禮。