The major challenge, argue the authors, is changing the mindset of expatriate scientists who remember poor laboratory facilities from their undergraduate days.
这组作者说，主要的挑战在于改变记得他们本科时期实验室设施不良的海外留学科学家的心态。
Firefighters, who had already labored for days in triple-digit temperatures, faced their gravest challenge Saturday in the foothills of the San Bernardino Mountains just east of the 215 Freeway.
到星期六，火警们已经在近百度高温中工作了数日，他们目前面临着最致命的挑战，因为大火燃烧的圣贝纳迪诺山脚一带就在215高速公路东面。
Firefighters, who had already labored for days in triple-digit temperatures, faced their gravest challenge Saturday in the foothills of the San Bernardino Mountains just east of the 215 Freeway.
到星期六，火警们已经在近百度高温中工作了数日，他们目前面临着最致命的挑战，因为大火燃烧的圣贝纳迪诺山脚一带就在215高速公路东面。
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