For 75 percent of those 35 million, ragweed is the primary allergen, he added.

对于这35,000,000人的75%来说，豚草是首要过敏原，他补充道。

youdao

For 75 percent of those 35 million, ragweed is the primary allergen, he added.

对于这35,000,000人的75%来说，豚草是首要过敏原，他补充道。

youdao