It is a crime to counterfeit money.

伪造钱币是犯罪行为。

youdao

They were more difficult to counterfeit.

它们更难伪造。

youdao

Club shirts are easy to counterfeit.

球衣很容易被盗版。

youdao

The W.H.O.estimates that up to thirty percent of the medicines on sale in many of those countries are counterfeit.

VOA: special.2010.02.22

And in the case in Nigeria, an illegal chemical dealer sold counterfeit glycerin to a drug company.

VOA: special.2010.02.22

It also estimates that up to fifty percent of the medicine sold on the Internet is counterfeit.

VOA: special.2010.03.01

If a hacker were able to counterfeit the script, the entire currency might become worthless.

ECONOMIST: So many ways to pay online

This is part of the reason why bitcoin is so difficult to counterfeit.

FORBES: Bitcoin: Whatever It Is, It's Not Money!

Phantom shares are similar to counterfeit dollars that move through the system seamlessly until someone is caught holding a worthless bill.

FORBES: Intelligent Investing Briefing Book