求翻译：80年代中期，我国开始进行中国骨质疏松症大规模的流行病调查研究工作，获得了中国人最早的关于骨密度的第一手材料，并先后召开了五届全国骨质疏松学术研讨会和两届国际骨质疏松学术研讨会，有力地推动了我国骨质疏松症研究的开展和普及。是什么意思？

The mid-1980s, China began the China large-scale epidemiological investigation of osteoporosis research, the earliest Chinese people first-hand material on the bone mineral density, and has held the fifth National Osteoporosis Conference and The two-time International Osteoporosis Symposium, a stron

In the mid-80, China has begun to be China's osteoporosis mass of the work, and for epidemiological studies and research by the Chinese as early as in the bone density of the first-hand material, and have held the 5th National Symposium on osteoporosis and the two session of the International Sympos

The 80's intermediate stages, our country starts to carry on the China osteoporosis sickness large-scale epidemic disease investigation and study work, has obtained the Chinese early about the bone density first material, and successively held five session of nation osteoporosis academic seminar and

80 medium-term, China began a large-scale epidemiological study of osteoporosis in China, access to first-hand information on the bone mineral density of the Chinese first, and has held five national symposium on osteoporosis and two sessions of the International Symposium on osteoporosis, effective

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