Even in a time of climate change, it's hard to be a nuclear booster.
即便是在气候变迁时代，要成为一名核子支持者也相当困难。
2
Many runners, from beginners to advanced, run a half marathon during their marathon training as a confidence booster and a way to figure out their marathon goal time.
许多跑步者，无论是新手还是老手，会在马拉松训练的时候跑半程，以此来增强自信并确定马拉松的目标时间。
3
They have some sort of genetic booster rocket and they seem to be functioning better for longer periods of time than centenarians.