我们在北京做出了一项历史性声明——美国将减排幅度加倍，中国也第一次承诺减排。

In Beijing, we made a historic announcement: the United States will double the pace at which we cut carbon pollution. And China committed, for the first time, to limiting their emissions.

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如果该调查有所发现的话，这就不是电信服务商第一次因其承诺的宽带速度和实际提供给顾客的网速不一致而陷入麻烦。

If the investigation uncovers anything, it wouldn't be the first time a telecom provider got into trouble over the broadband speeds it promised and delivered customers.

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这是第一次发达国家以我们的目标和时间表去做出承诺。

That was the first time that the developed countries ever made a commitment with our targets and timetables.

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