flagship
/ˈflægʃɪp/noun
1- the ship in a fleet which carries the admiral commanding旗舰, 指挥舰。
1.1
- the best or most important thing owned or produced by a particular organization（某组织的）最佳物; 首要物; 标志产品, 拳头产品, 王牌产品：
this bill is the flagship of the government's legislative programme
这项法案是政府立法计划中制定得最好的一项
as modifier their flagship product.他们的王牌产品。