翻译下列句子 1. A 4.5 percent increase in social welfare spending reflects the costs involved in an aging society and declining birthrate. 2. To boost the international competitiveness of domestic companies, the government is considering investing about 10 million dollars annually to help fund the development of new private sector products. 3. But the countervailing arguments for the tax on fuel oil are equally strong, as Beijing is in the midst of a concerted push to force more efficient use of energy, something a tax rise would buttress.