Since then, my presence is as potent on his nerves as a ghost, and I fancy he sees me often, though I am not near.

从那以后，我的存在在他跟前就像一个摆脱不了的鬼似的缠住他的神经，即使我不在他旁边，我猜想他也常常看得见我。

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In these quarters, one sensed that organic foods were a sort of talisman, sufficiently potent in their very presence to repeal the germ theory of disease.

在这些地方，有机食品的概念似乎成为他们的护身符，似乎这个概念本身便能击败有关疾病的细菌理论，保证他们吃了没事。

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It's with this image of a brooding impregnation that Milton announces the presence in his poem of his most potent, what I think is the most interesting, theological innovation that he comes up with here.

正是通过这个孵伏怀孕的形象,弥尔顿在这里宣告了他在这首诗中,最具潜力，最有趣的神学新观点。

耶鲁公开课 - 弥尔顿课程节选

He remained a potent presence on the back benches, making fierce attacks on the government and writing books and pamphlets denouncing the European Union and in praise of US capitalism.

BBC: John Redwood

Google Android has slowly gained presence there while Nokia is still a potent player in emerging markets although it has lost some of its wind in recent years.

FORBES: Emerging Markets Appetite For iPhone Takes Apple To $510