('US') She shifted 'into' low/high 'gear'. = ('Brit') She changed 'into' bottom/top 'gear'. [=she changed to a gear that allows for a slower/faster rate of speed]
This discovery will bring about a 'paradigm shift' in our understanding of evolution. [=will cause people to understand evolution in a completely new way]
We need to 'shift ourselves' [='get moving'] if we're going to make it home before dark.
(..) That was my boss, Martin. - I have to go to the restaurant. - You're kidding. There's a convention in town, and business is just crazy. But you worked a double shift yesterday and the day before that. He's working you to death, Piper. You were gonna talk to Martin about this weeks ago. (..)1998 TvShow: Charmed Title: The Truth Is Out There... and It Hurts Season: 1 Episode 8