There exist two main complementary usage scenarios and operations

其中有两个主要的、互补的使用方案和操作

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There exist two kinds of solitude:one is relative, the other is absolute.

存在着两种孤独：相对意义上的孤独，和绝对意义上的孤独。

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There exist two types of interest parity - covered and uncovered interest parity.

存在两种类型的利率平价-覆盖与抛补利率平价。

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And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波,可以存在在这条弦上，驻波或行波。

麻省理工公开课 - 固态化学导论课程节选

There are two general theories that exist about the source of the value premium.

FORBES: Value Stocks and Dividends

For conflict to exist, there must be at least two points of view, or stories, between which we are undecided as to which to believe.

FORBES: Meeting the Big Data challenge: DON'T be objective

And if you drink beer without hops in it, and there are one or two examples of beer that still exist, it's an awful lot more like wine.

NPR: Looking at the World Through Beer Glasses