1. 酸的;酸味的
    Something that is sour has a sharp, unpleasant taste like the taste of a lemon.

sour的翻译

    e.g. The stewed apple was sour even with honey.
           炖煮的苹果即便加了蜂蜜还是很酸。

2. (牛奶)变质的，馊的
    Sour milk is milk that has an unpleasant taste because it is no longer fresh.

sour是什么意思

3. (人)乖戾的，尖酸刻薄的，不友好的
    Someone who is sour is bad-tempered and unfriendly.

    e.g. She made a sour face in his direction...
           她冲他阴沉着脸。
    e.g. Police, weary and increasingly sour in mood, wonder aloud why the situation has been allowed to deteriorate.
           警察们疲惫不堪，心情也越来越糟糕，他们不禁满腹狐疑地问：为什么听凭情况不断地恶化下去？

4. (状况、关系等)变坏，变糟，不再令人满意
    If a situation or relationship turns sour or goes sour, it stops being enjoyable or satisfactory.

    e.g. Everything turned sour for me there...
           在那里，对我来说一切变得很不顺利。
    e.g. Even the European dream is beginning to turn sour...
           甚至连欧洲之梦都开始破灭了。

5. (使)(友谊、局势、态度等)变坏;(使)恶化
    If a friendship, situation, or attitude sours or if something sours it, it becomes less friendly, enjoyable, or hopeful.

    e.g. If anything sours the relationship, it is likely to be real differences in their world-views...
           如果有什么东西能够破坏这种关系的话，那可能就是他们世界观方面存在的实质性差异。
    e.g. Her mood soured a little.
           她的心情有点差。

6. 酸葡萄(喻指由于得不到而加以贬低的东西)
    If you refer to someone's attitude as sour grapes, you mean that they say that something is worthless or undesirable because they want it themselves but cannot have it.

    e.g. Page's response to the suggestion that this might be sour grapes because his company lost the bid is: 'Life's too short for that.'
           有人认为这是佩奇的酸葡萄心理在作怪，因为他的公司未能中标，佩奇对此的回应是：“人生苦短，谁有闲工夫去耿耿于怀呢？”