Two specialised senses you'll meet: (1) aerospace —
助推器 is a 'booster (rocket)', the strap-on stage that gives the main rocket extra thrust at liftoff; (2) economics —
助推 is the standard Chinese rendering of Richard Thaler's 'nudge' (from his book 'Nudge: Improving Decisions about Health, Wealth, and Happiness' / 《
助推》), a gentle behavioral prompt that steers choices without forbidding any.