1. Iron reacts with water and air to produce rust. 铁和水及空气发生反应产生铁锈。
2. It is important to remember that each person reacts differently. 重要的是要记住每个人的反应不同。
3. When hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid. 当硫化氢与水中的氧反应，得到的就是硫酸。
4. The stock market reacts positively when companies tie CEO pay to, say, stock prices, a sign that those practices build up a corporate value not just for the CEO. 比如当公司将总裁的薪酬与股票价格挂钩时，股票市场就会做出积极反应，这表明这些做法所创造的企业价值不仅仅是为了公司总裁。
5. As technology becomes ever more potent and Nature reacts ever more violently, there is an urgent need to rethink how best to deal with the growing contradictions between Man and Nature. 随着技术变得越来越强大，自然的反应越来越激烈，我们迫切需要重新思考如何最好地处理人与自然之间日益增长的矛盾。
