1890, "one who boosts" something, agent noun from boost (v.). Electrical sense is recorded from 1894. Young child's booster chair is attested under that name from 1960.
双语例句
1. The combination of sex and treachery proved a copper-bottomed circulation booster.
事实证明，性和背叛的话题结合起来无疑大大增加了发行量。
来自柯林斯例句
2. It was amazing what a morale booster her visits proved.
令人惊诧的是，她的访问大大鼓舞了士气。
来自柯林斯例句
3. This win has been a great morale booster.
这次获胜是一次巨大的精神鼓舞。
来自柯林斯例句
4. Praise is a great confidence booster.
赞扬是一种很好的信心增强剂。
来自柯林斯例句
5. This battery booster is a boon for photographers.
