随着各国投入更多资金试图改变不稳定的降雨模式，却鲜有持久成效，这类投资的回报问题日益凸显。
As countries spend more trying to alter erratic rainfall patterns with few lasting results, the question of the payoff rises for such investments.
日本时报
厄尔尼诺现象考验东南亚人工增雨押注的极限El Nino fires test limits of Southeast Asia’s cloud-seeding bet
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