The research effort has focused on tracing the effects of growing levels of five compounds.
研究集中跟踪5种化合物水平上升带来的影响。
Sixty-five percent of the 1987 budget went for nuclear weapons research and production.
1987年预算的65%用在了核武器的研制上。
At its peak in 2007 it was worth some $65 billion, reckons Clare McAndrew, founder of Arts Economics, a research firm—double the figure five years earlier.
Arts Economics 研究公司的创始人克莱尔·麦克安德鲁估算,在2007年的巅峰期,它的价值约为650亿美元,是五年前的两倍。
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