Yellow rain is caused by pine tree pollen according to investigation of many years in Changsha.

根据对长沙黄雨的多年观测，确定黄雨是松树花粉所致。

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Yellow rain is caused by pine tree pollen according to investigation of many years in Changsha.

根据对长沙黄雨的多年观测，确定黄雨是松树花粉所致。

youdao