How to say first/first time/for the first time in Chinese 首次

我空军直升机首次试飞藏北高原。 ( The first test of our Air Force helicopter flew over the northern Tibetan Plateau. )

提出这一观点尚属首次。 ( This is the first time that this view has been put forward. )

这个剧团是首次来京献演。 ( This troupe is in Beijing for the first time. )

这种战机首次亮相 ( Debut of this fighter )

中国神舟五号飞船首次载人飞行 ( China's Shenzhou V spacecraft first manned flight )