中文：

石油是一种重要的能源和原材料，其价格波动一直受到广泛关注。近年来，石油价格下跌引发了全球范围内的关注。那么，石油为什么会下跌呢？

首先，供求关系是影响石油价格的主要因素之一。随着全球经济的复苏，石油需求量逐渐增加，但石油供应量却超过了需求量，导致石油价格下跌。

其次，美元汇率也是影响石油价格的重要因素之一。美元汇率下跌会导致以美元计价的石油价格上涨，反之亦然。

此外，政治因素也对石油价格产生了影响。例如，中东地区的政治局势不稳定，导致石油供应受到影响，进而影响石油价格。

最后，技术进步和替代能源的发展也是导致石油价格下跌的因素之一。随着可再生能源和其他替代能源的发展，人们逐渐减少了对石油的依赖，进而导致石油价格下跌。

总的来说，石油价格下跌是由多种因素共同作用的结果。未来，随着全球经济的变化、政治局势的发展以及替代能源的进一步推广，石油价格仍将保持波动。

英文：

Oil is an important energy and raw material, and its price fluctuations have always received widespread attention. In recent years, the decline in oil prices has caused worldwide concern. So, why does oil prices fall?

Firstly, the relationship between supply and demand is one of the main factors affecting oil prices. With the recovery of the global economy, oil demand is gradually increasing, but oil supply exceeds demand, leading to a decline in oil prices.

Secondly, the exchange rate of the US dollar is also an important factor affecting oil prices. A decline in the US dollar exchange rate will lead to an increase in the price of oil priced in US dollars, and vice versa.

In addition, political factors also have an impact on oil prices. For example, the unstable political situation in the Middle East has affected the supply of oil and thus affected oil prices.

Finally, technological progress and the development of alternative energy are also factors leading to a decline in oil prices. With the development of renewable energy and other alternative energy sources, people have gradually reduced their dependence on oil, leading to a decline in oil prices.

Overall, the decline in oil prices is the result of a combination of multiple factors. In the future, with changes in the global economy, the development of the political situation, and the further promotion of alternative energy sources, oil prices will continue to fluctuate.