Level 5 · word 6,842 of 20,000
booster
/ˈbuːstər/
American
- n. 支持者, 助推器
- Definition
- n. a person who actively supports something, or a device that increases power
- Example
- The nurse gave him a booster shot to protect against the illness.
- 护士给他打了一针加强针，以预防这种疾病。