If it's still being used today, it must be a real proven system.

如果它一直沿用至今，它必须是一个真正的行之有效的制度。

youdao

No prior tax experience is required to put this proven system to work for your success!

没有事先税的经验，是需要把这个证明制度，以工作为您的成功！

youdao

Franchising provides a great opportunity to become your own boss through following a proven system.

特许经营，在遵守特定系统下为您提供了一个良好的机会，并让您成为自己的老板。

youdao

"The best way to responsibly advance our security and the security of our allies is to deploy a missile defense system that best responds to the threats that we face and that utilizes technology that is both proven and cost effective."

VOA: standard.2009.09.17

But there isn't much else that is known about its capabilities beyond what already exists with GPS, which is a proven system.

FORBES: Europe Reinvents GPS

This is a time-proven system that works very very well.

FORBES: The Small Business Administration Decides to Hurt Small Businesses

Rather than trying to figure out a business idea, you could buy into a big chain with a proven system and established brand name, rake in profits, and never have to report to a boss again.

FORBES: 5 Reasons Why Franchise Ownership Is No Longer the American Dream