It will involve swapping cheap but dirty fuels for cleaner but dearer ones, as Congress intends, as well as building lots of expensive new power plants to replace older, more polluting ones.
这包括国会计划的将低价但不清洁的燃料换成清洁但高价的燃料，还包括建造许多昂贵的新电站来取代污染环境的旧电站。
The new digital systems replace older technology controls, which has greatly improved reliability.
新的数字化系统代替了旧的技术控制，此举在很大程度上提高了可靠性。
America even has too much garbage dump capacity, thanks to the fact that we have been building large regional dumps to replace older, smaller local dumps.
美国的垃圾倾卸能力非常强，因为美国人一直在修建大型区域性垃圾场，以取代陈旧的小型地方性垃圾场。
Its fleet size has dropped below 90 aircraft as it moves to replace older aircraft, and its turnover rose 10 percent, with its share of the Chinese charter market now at 70 percent, Mr.
方新宇称，随着公司更换老旧飞机，其机队的规模降至不足90架，同时公司营业额增加10%，目前在中国包机市场占70%的份额。
Its fleet size has dropped below 90 aircraft as it moves to replace older aircraft, and its turnover rose 10 percent, with its share of the Chinese charter market now at 70 percent, Mr.
方新宇称，随着公司更换老旧飞机，其机队的规模降至不足90架，同时公司营业额增加10%，目前在中国包机市场占70%的份额。
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