鱼曾是劳动者获取蛋白质的主要来源。
迁出市中心的现象非常普遍，而市中心的租户主要是由贫穷的劳动者组成。
Movement out of city centers was widespread, and downtown tenants were predominantly made up of the working poor.
真正使中国的经济转到主要依靠科技进步和提高劳动者素质上来，着重提高经济的增长质量和效益。
And we will be able to in that way raise the quality and efficiency of China's economic development.
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