乱真

tā huà de hú dié jī hū kě yǐ luàn zhēn

她画的蝴蝶几乎可以乱真。

The butterflies she drew can pass for real.

bù yào yǐ jiǎ luàn zhēn

不要以假乱真

do not pass off a fake as genuine

fù zhì jīng pǐn jǐ kě luàn zhēn

复制精品，几可乱真。

The fine copy can almost pass for the genuine one.

luàn zhēn zhèn dàng

乱真振荡

spurious oscillation