1.die away 指声音、风、光线等渐息、渐弱。如：
The sound of the car died away in the distance. 汽车的声音消失在远处。

2. die down 意为(慢慢)熄灭、平静下来。如：
The fire died down. 火慢慢熄了。
His anger has died down a bit. 他的怒气已消了一点。

3. die off 意为一个一个地死去(= die one by one)。如：
As he grew older, his relatives all died off. 随着他年龄的增长，他的亲人都一个一个地死去了。

4. die out 指家族、种族、习俗、观念等灭绝、绝迹。如：
Many old customs are dying out. 许多旧习俗正在消失。

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