香港維多利亞港夜景 · Hong Kong Victoria Harbour skyline at night

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Bickel, Hammel & O'Connell, Science 187 (1975) ·

踢拳比賽中一記直拳被格擋 · A jab being blocked in a kickboxing bout
Claus Michelfelder, CC BY-SA 4.0

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