名詞 booster:

1. a person who backs a politician or a team etc.
   同義詞：supporter, protagonist, champion, admirer, friend
2. someone who is an active supporter and advocate
   同義詞：promoter, plugger
3. a thief who steals goods that are in a store
   同義詞：shoplifter, lifter
4. an amplifier for restoring the strength of a transmitted signal
   同義詞：booster amplifier, booster station, relay link, relay station, relay transmitter
5. the first stage of a multistage rocket
   同義詞：booster rocket, booster unit, takeoff booster, takeoff rocket
6. an additional dose that makes sure the first dose was effective
   同義詞：booster dose, booster shot, recall dose

1. Expendable rocket boosters.
   不能再用的助推火箭
2. Our vet is very efficient; he sends us a reminder when the cat is due for a booster vaccination as a matter of course.
   我們的獸醫(yī)工作效率很高，當(dāng)貓要按時(shí)免疫接種時(shí)，他總給我們寄一張?zhí)嵝褑蝸怼?/div>

boost.er

n.（名詞）
One that boosts, as:
推動(dòng)者：一個(gè)推動(dòng)的人或物，如：
A device for increasing power or effectiveness.
起推動(dòng)作用的輔助裝置：用來增加動(dòng)力或效力的裝置
An enthusiastic promoter, as of a sports team or school.
積極的支持者：某體育運(yùn)動(dòng)隊(duì)或?qū)W校等的熱情支持者
Electronics A radio-frequency amplifier.
【電子學(xué)】 輔助放大器：一種無線電頻率放大器
The primary stage of a multistage rocket that provides the main thrust for launch, liftoff, and initial flight.
助推器：多級(jí)火箭的第一級(jí)，為發(fā)射、升空和最初飛行提供主要推力
A booster shot.
強(qiáng)化注射劑量
Slang One who steals goods on display in a store.
【俚語】 商店扒手：偷商店擺設(shè)的貨物的扒手