The trucks gain/gather 'speed' as they drive down the hill. = The trucks pick up 'speed' as they drive down the hill. [=the trucks go faster as they drive down the hill]
He types at a 'speed' of about 50 words per minute. = His typing 'speed' is about 50 words per minute.
Let me 'bring you up to speed' on our plans. [=let me tell you about the changes in our plans]
(..) is supposed to do, sir. - That's why? - Yes. I'm still gonna have a tarte tatin. I always liked competition. Extreme sports, speed... Going faster, higher... I had it all with paragliding. I got higher, could see everything. And breathe. I was raised with the conviction I was (..)2011 The Intouchables