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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。

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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。

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Since the pertussis vaccine's protection can wear off with time, a booster shot is recommended for adolescents at their 11-year-old checkup visit, as well as for adults who care for young infants, in order to protect from whooping cough until the babies have their own immunity.

CNN: Can breast-feeding prevent whooping cough?

If a theme park agreement is announced, it will be a major confidence-booster for Hong Kong at a time when the economy is recovering from the Asian crisis.

CNN: ASIANOW - Asiaweek | Intelligence | The Week Ahead: Hong Kong's Disneyland

Dee was Miami's AD for much of the time that the former booster at the center of the scandal, convicted Ponzi scheme architect Nevin Shapiro, was providing impermissible benefits to athletes, coaches and recruits.

NPR: NCAA Lashes Back At Miami, Citing Personal Attacks