1. 坏脾气;暴脾气
    If you refer to someone's temper or say that they have a temper, you mean that they become angry very easily.

    e.g. He had a temper and could be nasty...
           他脾气不大好，有时凶得很。
    e.g. His short temper had become notorious...
           他的臭脾气是出了名的。

2. 情绪;心情
    Your temper is the way you are feeling at a particular time. If you are in a good temper, you feel cheerful. If you are in a bad temper, you feel angry and impatient.

    e.g. I was in a bad temper last night...
           昨晚我心情不好。
    e.g. He was in a very good temper...
           他当时心情非常好。

3. 使缓和;使温和
    To temper something means to make it less extreme.

    e.g. For others, especially the young and foolish, the state will temper justice with mercy...
           对待其他人时，尤其是年轻人和愚蠢的人，国家会刚柔并济。
    e.g. He had to learn to temper his enthusiasm.
           他得学着给自己的热情降温。

4. 发脾气/开始发火
    If someone is in a temper or gets into a temper, the way that they are behaving shows that they are feeling angry and impatient.

    e.g. She was still in a temper when Colin arrived...
           科林到的时候，她气还没有消。
    e.g. When I try to explain how I feel he just flies into a temper.
           我刚要解释我心里是怎么想的，他就勃然大怒。

5. 发脾气;大发雷霆
    If you lose your temper, you become so angry that you shout at someone or show in some other way that you are no longer in control of yourself.

    e.g. I've never seen him get cross or lose his temper...
           我从未见过他生气或者发火。
    e.g. I lost my temper and banged my book down on the desk.
           我大发雷霆，把书砰地往课桌上一摔。