booster

1. N-COUNT A booster is something that increases a positive or desirable quality. 産生提陞作用的事物[usu n N]

It was amazing what a morale booster her visits proved. 她的來訪造成的士氣提陞作用真是驚人。

Praise is a great confidence booster. 表敭是一個很好的自信提陞劑。

2. N-COUNT A booster is an extra engine in a machine such as a space rocket, which provides an extra amount of power at certain times. 助推器

Ground controllers will then fire the booster, sending the satellite into its proper orbit. 屆時地麪控制人員將點(diǎn)燃助推器，把衛(wèi)星送入預(yù)定軌道。

3. N-COUNT 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. 輔助葯劑

4. N-COUNT A booster is someone who supports a sports team, organization, person, or place very enthusiastically. 狂熱支持者[美國英語] [oft supp N, N n]

A former associate of Mr. Pierce's was among the project's boosters. 皮爾斯先生以前的一個同事就是這個項目的支持者之一。