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.

熱心網(wǎng)友

在所有生產(chǎn)國中，就生產(chǎn)能力來說，美國一直處于領(lǐng)先地位，盡管近來其生產(chǎn)能力從占1985年世界能力的26% （或 4。9MTPA）下降到2002年的14%（或4。1MTPA）