1 N-COUNT [usually n NOUN] 有正面效果的事物；起推动作用的事物 A booster is something that increases a positive or desirable quality. 有正面效果的事物；起推动作用的事物
2 N-COUNT 火箭助推器；推进器 A booster is an extra engine in a machine such as a space rocket, which provides an extra amount of power at certain times. 火箭助推器；推进器
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Ground controllers will then fire the booster, sending the satellite into its proper orbit.
然后地面控制人员将会发射推进器，把卫星送入正常轨道。
3 N-COUNT 加强剂量 A booster is a small injection of a drug that you have some time after a larger injection, in order to make sure that the first injection will remain effective. 加强剂量
4 N-COUNT [NOUN n] 拥护者；热心支持者 A booster is someone who supports a sports team, organization, person, or place very enthusiastically. 拥护者；热心支持者 [US]
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A former associate of Mr. Pierce's was among the project's boosters.
皮尔斯先生的一个前合伙人是这个计划的热心支持者之一。
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...the university's biggest athletic booster club.
该大学最大的体育爱好者俱乐部
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