四种不同的化学反应主导了工业界——当考虑到效用、耐用性、成本、安全性和性能时，它们中的每一种都有优劣之分。
Four different chemical reactions dominate the industry-each of which has pros and cons when it comes to utility, durability, cost, safety and performance.
查处企业低效用地的行为，需要客观科学地评价工业用地效能状况。
How to investigate and punish enterprises 'inefficient behavior, an objective scientific evaluation indices for effectiveness be needed.
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