首 + Measure Word/Noun
首 (shǒu) means "first" or "initial" when used as a prefix or adverb. It is a formal and concise alternative to 第一 and commonly appears in written Chinese and news language. Examples include 首次 (first time) and 首位 (first place/person).
这是她首次参加国际比赛就拿了冠军。
zhè shì tā shǒucì cānjiā guójì bǐsài jiù ná le guànjūn.
This was her first time participating in an international competition, and she won the championship.
他是首位获得这个奖项的亚洲科学家。
tā shì shǒu wèi huòdé zhège jiǎngxiàng de yàzhōu kēxuéjiā.
He is the first Asian scientist to receive this award.
公司首批产品将于下月正式上市。
gōngsī shǒu pī chǎnpǐn jiāng yú xià yuè zhèngshì shàngshì.
The company's first batch of products will officially launch next month.