plague, чума (епідемія), invent, винаходити, discover, робити відкриття, calculate, підраховувати, DNA, ДНК, evolution, еволюція, nuclear power, ядерна енергія, penicillin, пеніцилін, X-rays, рентгенівські промені, comets and nebulae, комети та туманності

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