“超低排放新区（Ulez）”很可能是明年伦敦市长选举的重大议题。

The new ultra-low emission zone (Ulez) is likely to be a big issue in next year's mayoral election.

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今天的重大议题之一是教育。

One of the biggest issues today is education.

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官方说，各国代表在其它重大议题上也达成了共识。

Officials say the delegates also agreed on other major issues.

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There's never been a successful third-party political culture take hold in this country without one really big issue to drive it.

美国就从没有过,第三政党真正成功执政的时候,因为缺乏一个真正重大的议题来支持它

耶鲁公开课 - 美国内战与重建课程节选