随着工人阶级的繁荣和佣人短缺的出现，家政成为了受教育阶级感兴趣的事情。
As the working classes prospered and the servant shortage set in, housekeeping became a matter of interest to the educated classes.
全球有将近十亿人在严重的水资源短缺中讨生活，而且随着气候变化和高速的城市化进程，他们的生活状况只会变得更加恶劣。
Nearly a billion people on the planet manage their lives with serious water shortages, and their circumstances are only likely to worsen with climate change and rapid urbanization.
随着医用同位素短缺的危机蔓延全球，其他国家开始展开行动。
With this shortage of medical isotopes looming worldwide, other countries have begun to act.
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