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1. The SADC summit is expected to be held in Johannesburg this year.
预计今年南非发展共同体峰会将在约翰内斯堡举行。
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2. The SADC countries have been working together to promote peace and stability in the region.
南非发展共同体国家一直在努力合作，以促进该地区的和平与稳定。
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3. The SADC has been instrumental in facilitating economic growth and development in the region.
南非发展共同体在推动该地区经济增长和发展方面发挥了重要作用。