有些人预言将来原油的产量是每天六百捅，尽管许多都是低等级原油。
Some talk of 6m barrels a day in the future, albeit much of it low-grade.
较低等级CCC级发行人的数量在过去21年里几乎增加了两倍。
The number of lowly-rated CCC issuers has almost tripled over the past 21 years.
他们还私下通知违规污染企业他们所获得的低等级，给他们六个月的时间清理。
Privately, they notified illegally polluting factories of their failing grade and gave them six months to clean up.
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