She is an expert juggler of tasks, happiest when operating at full throttle.
What does the colored words mean?
Whehter juggler equals to "magician"?
Give me a hand, thanks
No, the juggling thing is about juggling her tasks. She has many tasks to juggle = deal with one after another and she is happiest when she is really busy. At full throttle means very busy.
Mechanically speaking a throttle is a valve that controls the fuel flow into the engine. If you are at full throttle, you are giving the engine the max amount of gas so that the engine can accelerate to its highest speed.