1
be a booster of sth
She is a booster of local charities.
她是当地慈善事业的支持者。
支持者；后援者
先理解核心含义，再看它在真实句子里的用法。
支持者；后援者
a person who backs a politician or a team etc.
She is a booster of local charities.
她是当地慈善事业的支持者。
起推动作用的事物。
Something that boosts.
支持政治家或团队等的人
a person who backs a politician or a team etc.
多级火箭的第一级,提供主要或辅助推力以实现起飞和早期飞行。
The first stage of a multistage rocket, providing primary or supplemental thrust for liftoff and early flight.
积极的支持者和倡导者
someone who is an active supporter and advocate
The football club's biggest booster donated new equipment to the youth team.
这家足球俱乐部最大的支持者为青年队捐赠了新装备。
She is an enthusiastic booster of the local library's fundraising campaign.
她是当地图书馆筹款活动的热心支持者。
The town's boosters worked together to attract new businesses to the area.
该镇的支持者们共同努力，吸引新企业来此落户。
She is a booster of local charities.
她是当地慈善事业的支持者。
The new policy acted as a booster for the economy.
新政策对经济起到了推动作用。
形容词常为 morale, confidence, ego 等。
The win was a real morale booster for the team.
这场胜利对团队来说是一剂真正的士气提振剂。
Not this
I want to booster my energy.
Use this
I want to boost my energy.
booster是名词，不能用作动词；这里需要动词boost表示提升。
Not this
I got my third dose of COVID-19 boost.
Use this
I got my third dose of COVID-19 booster.
在疫苗语境中，加强针的名词是booster，不是boost。Boost是动词或名词表示增加，但booster特指加强剂。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
加强针；加强剂量
Do I need a booster shot before traveling?
旅行前我需要打加强针吗？
助推火箭
The booster rocket separated after two minutes.
两分钟后助推火箭分离了。
固体火箭助推器
The space shuttle used two solid rocket boosters.
航天飞机使用了两枚固体火箭助推器。
增压泵；升压泵
A booster pump increases water pressure in the building.
增压泵增加建筑物内的水压。
鼓舞士气的事物
The team's win was a great morale booster.
球队的胜利极大地鼓舞了士气。
儿童加高座椅
She uses a booster seat in the car.
她在车上用儿童加高座椅。
鼓舞士气的事
The team's win was a huge morale booster.
球队的胜利极大地鼓舞了士气。
增强信心的事
Getting the job was a real confidence booster.
得到这份工作确实增强了我的信心。
满足虚荣心的事
The compliment was an ego booster for her.
那句赞美让她很受用。
发长 /uː/ 音 (如 food, boot)
Use booster naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 booster 拆成 boost（提升、打气）+ er，记住它是“给人或事提升助力的人或物”：支持者、助推器。
语域：neutral 常见场景：political campaigns、sports and school booster clubs、community fundraising、local news 作“支持者、后援者”时，booster 通常指热情支持某人或某事的人，多用于政治、体育、社区活动等场合。语气比中性的 supporter 更积极、略偏口语，但在新闻报道中也较常见。
与 booster 真正押韵的是 rooster /ˈrustɚ/。boaster /ˈboʊstɚ/、toaster /ˈtoʊstɚ/、monster /ˈmɑːnstɚ/、gangster /ˈɡæŋstɚ/、youngster /ˈjʌŋstɚ/ 虽都以 -ster 结尾，但重读元音不同，读音与 booster 不押韵。
Dictionary facts from ECDICT, WIKTIONARY.
Watch the sound change