来自 + Source / 自 + Source
自 (zì) means "from" and is used in formal or written Chinese to indicate the origin or source of something. It often combines with 来 to form 来自 (to come from), as in 来自熟悉的语言 (coming from a familiar language).
这首歌来自一部很有名的电影。
Zhè shǒu gē láizì yī bù hěn yǒumíng de diànyǐng.
This song comes from a very famous movie.
这些留学生来自不同的国家。
Zhèxiē liúxuéshēng láizì bùtóng de guójiā.
These international students come from different countries.
自古以来,人们就对星空充满了好奇。
Zìgǔ yǐlái, rénmen jiù duì xīngkōng chōngmǎnle hàoqí.
Since ancient times, people have been full of curiosity about the starry sky.