义项
表示原因，比"因为"更正式
Because of — the same job as 因为, pitched a register higher, at home in a report or a notice more than a chat. It can open the reason clause (由于天气不好，比赛取消了) or, like a preposition, sit directly before a noun phrase (由于工作原因).
conjunction
例句
- 由于下雪，飞机不能起飞。由於下雪，飛機不能起飛。Yóuyú (second tone, rising) xià (fourth tone, falling) xuě, (third tone, dipping) fēijī (first tone, high and level) bù (fourth tone, falling) néng (second tone, rising) qǐfēi. (third tone, dipping)···
Owing to the snow, the plane can’t take off.
- 由于身体不好，他没有参加比赛。由於身體不好，他沒有參加比賽。Yóuyú (second tone, rising) shēntǐ (first tone, high and level) bù (fourth tone, falling) hǎo, (third tone, dipping) tā (first tone, high and level) méiyǒu (second tone, rising) cānjiā (first tone, high and level) bǐsài. (third tone, dipping)···
Owing to poor health, he didn’t take part in the competition.
常见错误
不太对由于，他没有来上课。
正确由于生病，他没有来上课。
由于 always needs the reason spelled out right after it, as a clause or a noun phrase — it cannot be left standing alone at the head of a sentence; nothing has been said yet for it to point back to.