enconomic collapse 经济崩溃
technical-and-enconomic indexs 涵义经济技术指标
The experimental results show that this method is an effective one which can bring about remarkable social and enconomic benefits.
试验结果表明，该法去除铬渣毒性彻底，社会效益十分显著，是铬渣利用的一种有效途径。
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