3 sentences

1. 她是第一次一个人住。

   tā shì dì​yī​cì yí​ge​rén zhù.

   She's living alone for the first time.

   Source: OpenSubtitles

2. 有一次，一个电工和他的搭档走进一所又旧又黑的房子去修电。

   yǒu​yī​cì, yī​ge diàn​gōng hé tā de dā​dàng zǒu jìn yī suǒ yòu jiù yòu hēi de fáng​zi qù xiū diàn.

   Once, an electrician and his partner went into an old dark house to fix the electricity.

   Source: CCMatrix

3. 一次一个鸡蛋加入牛油砂糖混合物里头，每次都要打匀后，才继续添加。

   yī​cì yī​ge jī​dàn jiā​rù niú​yóu shā​táng hùn​hé​wù li tou, měi​cì dōu yào dǎ yún hòu, cái jì​xù tiān​jiā.

   Add the eggs to the butter and sugar mixture one at a time, beating well after each addition.

   Source: UM-Corpus: News