科研之友
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摘要
<正>受全球变暖的影响,从1990年到现在,在美国和加拿大两国,花粉季节大约提前了20天到来,给人们造成了多种危害。40 years ago, when Dr. Stanley Fineman started as an allergist (过敏症专家), he told patients to start taking medications and preparing for the pollen(花粉) season in the middle of March.
- 出版日期2021
