выплачивать/окупаться, to pay off, спутник предоставляет прогнозы погоды, a satellite provides weather forecasts, приводить к изобретению, to lead to an invention, научные данные, scientific data, запутанный, confusing, начальная школа, primary school, быть под угрозой, to be threatened with, убеждать, to convince, убеждать друзей, to persuade friends

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