在他们的研究中，对几种地球工程方案成效进行了排序。
This study attempts to rank the likely effectiveness of various geo-engineering proposals.
按照这一方案，做这工作将更有成效。
在国际组织的协助下，关爱保护的努力和圈养方案已初见成效。
A concerted conservation effort and captive breeding programme, assisted by international organisations, has paid off.
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