1. 使增长；推动；改进；使兴旺
    If one thing boosts another, it causes it to increase, improve, or be more successful.

    e.g. It wants the government to take action to boost the economy...
           它希望政府采取行动促进经济发展。
    e.g. The move is designed to boost sales during the peak booking months of January and February.
           这一举措旨在增加1月和2月预订高峰期的销售量。

2. 增强，提高（信心或士气）
    If something boosts your confidence or morale, it improves it.

boost的翻译

    e.g. We need a big win to boost our confidence...
           我们需要大胜一场来增强信心。
    e.g. Do what you can to give her confidence and boost her morale.
           尽你所能让她树立信心，提高士气。