European Standards and CE Marking. Prior to exporting, U.S. manufacturers have to consider certification for the EU market. Certification is about conformity assessment (testing and certification) in order to declare compliance with EU regulatory requirements. For the majority of exported products, compliance is visibly testified by the use of CE marking. Use of standards is part of the process. Bearing in mind that testing and certification for the U.S. market are not sufficient for exporting to the EU, manufacturers will need to start from scratch in order to determine what it takes to comply with EU requirements.
Energy Conversion is a Warframe mod that increases Power Strength for the next ability cast after picking up an energy orb.
You use the premium currency to hurry things up, like getting into the warframe you want really badly, but otherwise I wouldn't even look at the store. There is ways to conserve platinum too, some players buy components stacks from the store for platinum to help get them too their new warframe faster. Remember - the fun of Warframe is after you've finished the 12 planets, it's all about farming new gear for the challenge worlds (accessed through keys and events).