Of the producing countries,the United States was until recently the leader in terms of capacity although its position of prominence declined from 26%,or 4.9 Mtpa,of world capacity in 1985 to 14.5%,or 4.1Mtpa,in 2002.
热心网友
在所有生产国中,就生产能力来说,美国一直处于领先地位,尽管近来其生产能力从占1985年世界能力的26% (或 4。9MTPA)下降到2002年的14%(或4。1MTPA)