Tā zài shíyàn shùjù shàng zuòwěi, bèi xuéxiào kāichú le.
He falsified experimental data and was expelled from the school.
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作伪 is formal and often appears in contexts like art forgery (作伪鉴定), academic fraud, and counterfeit antiques. For everyday lying use 撒谎 sāhuǎng or 说谎 shuōhuǎng instead.
history
The phrase echoes the 《尚书·周官》 line 作德,心逸日休;作伪,心劳日拙 — 'do good and the heart rests easier each day; act falsely and the heart wearies and grows clumsier' — making 作伪 a classical antonym of 作德.