The standard of living in many developing countries is still low.
许多发展中国家的生活水平仍然很低。
Iran is just one of the many countries developing nuclear capabilities.
伊朗只是众多开发核武力的国家之一。
Now many countries are developing the production technique of magnesia-carbon brick.
各国都在大力开发镁碳砖生产技术。
Now many countries are developing the production technique of magnesia-carbon brick.
各国都在大力开发镁碳砖生产技术。
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