Butterflies are seen at the Sensational Butterflies Exhibition at Natural History Museum in London, Britain, on April 14, 2018. The exhibition lasts till Sept. 16, 2018. (Xinhua/Han Yan)
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Butterflies are seen at the Sensational Butterflies Exhibition at Natural History Museum in London, Britain, on April 14, 2018. The exhibition lasts till Sept. 16, 2018. (Xinhua/Han Yan)
