Choice of music tend to be more fast-paced, and between the action does not coincide with the emergence of a more serious situation;

音乐节奏的选择较多趋向于快节奏，与动作之间配合出现不吻合的现象比较严重；

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But merger waves also tend to coincide with periods when share prices are high and, arguably, over-valued.

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Some would say that bubbles tend to coincide with periods of great economic change, such as the development of the railways or the internet.

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On the other hand, bear markets also tend to coincide with rising interest rates whereas now, for all his tough talk, Alan Greenspan, chairman of the Federal Reserve, shows little inclination to put rates up.

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