莉莲·卡尔德龙·加西杜埃尼亚斯为调查大气污染的影响招募儿童时，安娜只有七岁。
When Lilian Calderón-Garcidueñas recruited children for a study probing the effects of air pollution, Ana was just 7.
莉莲·卡尔德龙·加西杜埃尼亚斯为调查大气污染的影响招募儿童时，安娜只有七岁。
When Lilian Calderón-Garcidueñas recruited children for a study probing the effects of air pollution, Ana was just 7.
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