They are in the vanguard of technological advance.
们是技术发展的先导。
；先导
;的;They are in the vanguard of technological advance.
们是技术发展的先导。
the prototype was in the vanguard of technical development.
该原型处于技术发展的先锋地位。
In a way they played a vanguard role.
在某种意义
，们起了先锋的作用。
It has vanguard technology of friction welding and chroming and so on.
具磨擦焊接和镀铬等先进生产工艺。
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