A booster is a rocket that helps a spacecraft get more power to leave Earth or makes a missile go farther.
The booster ignited and propelled the spacecraft into orbit.
助推器点火并将航天器推进轨道。
A booster is a device that gives more power to an electrical machine.
The booster increased the voltage for the electrical system.
增压器提高了电气系统的电压。
A booster is an extra dose of a vaccine that is given to increase its effectiveness, like protecting you from a disease for a longer time.
She needed a tetanus booster shot after stepping on a rusty nail.
她踩到生锈的钉子后需要打一针破伤风加强针。
A booster is something that helps, encourages, or improves a person or thing.
The new coach was a real morale booster for the team.
新教练真是团队士气的提振者。
A booster is a person who supports someone or something, especially in politics.
The senator had many boosters at the fundraising event.
参议员在筹款活动中有很多支持者。