哪些是化学品、尤其是铅对儿童健康的长期影响？
What are the long-term effects of chemicals on children's health, especially lead?
问：哪些是化学品、尤其是铅对儿童健康的长期影响？
Q: What are the long-term effects of chemicals on children's health, especially lead?
问：哪些是化学品、尤其是铅对儿童健康的长期影响？
Q: What are the long-term effects of chemicals on children's health, especially lead?
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