The ECB has been very explicit about its separation principle since the launch of its non-conventional tools including covered bond purchasing program and also SMP.
欧洲央行非常明确地表示了利率工具和非传统工具（如在二级市场购买债券）用途的不同性。
In the valence bond treatment, explicit recourse is made to classical, localized bond structure.
价键法明显依赖经典的定域结构。
In the valence bond treatment, explicit recourse is made to classical, localized bond structure.
价键法明显依赖经典的定域结构。
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