事实已经证明，美国慢了其他国家一拍，拒绝签署1997年京都协议，也拒绝在国内采取任何控制排放的有效措施。
The US has proved to be the biggest laggard in the world, refusing to sign the 1997 Kyoto protocol or to adopt any effective domestic emissions controls.
这项计划就要求签署方公布来自矿产资源的收益，同意有效地利用这些资源造福于人民。
This requires they publish revenues from mining resources and agree to use these resources efficiently for the benefit of the people.
这个护照必须先行签署，官方才能确认其有效。
This passport has to be signed before the official can validate it.
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