A common theory is that they emerge from binary pairs.

普遍接受的理论认为，他们来自于二进制配对。

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Finally, we investigate the unidirectional transmission behavior of PC molecules consisting of nonlinear defect pairs by use of the coupled mode theory and the finite-difference time-domain technique.

最后，我们利用耦合模理论和有限时域差分技术研究了非线性缺陷对构成的光子晶体分子的单向导通行为。

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The Social Integration (SI) model of social constructionist organization theory is an academic model that pairs high explanatory power of human behaviour with extreme simplicity.

社会建构组织理论的社会融合（SI）模型是一个学术模型，它将人类行为的高解释力与极简性相匹配。

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Dr Brunton looked at the number of chicks fledged per nest in the colony she was observing and discovered that, contrary to the selfish-herd theory's predictions, pairs breeding near the edge of the colony were more successful than those at its centre.

ECONOMIST: Animal behaviour

After orchestrating 2 million collisions between lead nuclei and protons, like the sort you see above, the collider's Compact Muon Solenoid group and researchers at MIT suspect that stray, linked pairs of gluon particles in the mix were signs of color-glass condensate, a currently theory-only form of matter that sees gluons travel in liquid-like, quantum-entangled waves.

ENGADGET: Large Hadron Collider may have produced a previously undetected form of matter