In 1931, the cadmium pollution caused by the "Itai Itai disease" began to appear, to the 50's of last century and spread all over japan.
年，镉污染引发的“痛痛病”开始出现，到上世纪50 年代蔓延到全日本。
Medical studies have proved that cadmium can cause itai-itai disease after it enters human bodies.
医学研究已经证明，镉进入人体后可引起骨痛病。
Medical studies have proved that cadmium can cause itai-itai disease after it enters human bodies.
医学研究已经证明，镉进入人体后可引起骨痛病。
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