A penumbra of doubt surrounds the incident.

疑惑的阴影笼罩着该事件（（真相不明））。

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Admittedly, truly global celebrities are few in number. But they have a penumbra of agents, lawyers and image-makers.

尽管真正的全球性名人仍屈指可数，但与他们相关联的代理人、律师和形象代言人的数量相当可观。

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The genetic flexibility this hints at-of a core set of genes and a penumbra of others useful in particular circumstances-has, over the past decade, been confirmed for many other species of bacteria.

这个遗传上的弹性暗示了——有一套核心基因和一套用于特殊环境的外围基因——这在过去的十年里已经在其他种属的细菌中得到证实。

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They have sought to find a place for Australia in the penumbra of Asia.

ECONOMIST: God��s own republic?

What spectacle confronted them when they, first the host, then the guest, emerged silently, doubly dark, from obscurity by a passage from the rere of the house into the penumbra of the garden?

NEWYORKER: Silence, Exile, Punning

As Sigismund Blondy saw him, Zwelish walked in a fiery aura of loneliness, but Blondy had got inside the penumbra.

NEWYORKER: Lucky Alan