free pass

n.

免费入场（乘车）券；

复数：free passes

Environmental groups push back on Cheney amendment allowing birds to be killed; industry supportive
10 Review Essay: A Decade of War
Big challenge as California ramps up wind power: Golden eagles
One Playing Field For Everyone
Planning for a lead-free future
TS: Microsoft SQL Server 2008, Business Intelligence...
Racemization - free photochemical coupling of peptide segments
Open jet compensation during multi-pass printing
Hogmanay party pass allocations defended
Open jet compensation during multi-pass printing