There are all kinds of theories, used by all kinds of people in all kinds of contexts.

有形形色色的理论，在不同的语境下被各种各样的人使用。

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The discussions about "head voice" could be found in all kinds of theories of the school of Bel Canto.

纵观美声学派各种学说，有关“头声”的论述可以说俯拾皆是。

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In recent years, all kinds of theories on enterprise's financial management objective is put forward. Maximum of owner's wealth and of enterprise's value are the mainstream.

近年来，我国理论界在此基础上，也提出了各种关于我国企业财务管理目标的理论，占主流的是“所有者财富最大化”和“企业价值最大化”。

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All kinds of theories have been promulgated to explain this peak and decline in crime, and plenty of politicians in the 1990s took credit for it.

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But a small trace of someone else's DNA was found on the bag, helping spawn all kinds of theories about who else might have been there.

CNN: STORY HIGHLIGHTS

There are all kinds of theories about what might happen.

FORBES: IRS Announces Increase In Annual Exclusion For Gifts, Rest Remains a Mystery