outrider

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Posing as a bold outrider, as he did at the summit, may yet help.
他在峰会上摆出勇敢的先驱者的姿态或许会对塑造这样的形象有所帮助。
His outrider status may prove as influential on matters of tax and spend.
克雷格的先驱者地位可以在其对税收与支出事务领域所施加的影响上得到佐证。
Earlier this month, Nick Boles, a new Tory MP and kite-flying outrider for the modernising camp, called for the two parties to forge an electoral pact at the next election.
本月初，保守党新议员兼为现代化阵营放风探路的尼克·伯尔斯，呼吁两党在下届选举中缔结选举协议。

Earlier this month, Nick Boles, a new Tory MP and kite-flying outrider for the modernising camp, called for the two parties to forge an electoral pact at the next election.
ECONOMIST: Bagehot
For Hamas, the objective of their humanitarian activities, however, is identical to that of their terrorist cells: the destruction of the "infidel" West's outrider in the region, Israel, as part of a wider jihad (holy war) against non-believers globally.
CENTERFORSECURITYPOLICY: Wishful thinking about Islamist terror
They threw millions of people out of stable and comparatively well-paid work into infrequent, badly paid temporary jobs—or trapped them in towns suddenly bereft of any reason to exist and with no jobs to apply for (intriguingly, this is a position that Norman Tebbit, a Thatcherite outrider interviewed in the book, seems to have some sympathy with).
ECONOMIST: Unfairly, by its snobbish fellow citizens

a person, especially a police officer, who rides on a motorcycle next to or in front of an official vehicle

Outriders are people such as police officers who ride on motorcycles or horses beside or in front of an official vehicle, in order to protect the people in the vehicle.