Investigation and comparison of pollen grains have been made for four genera of Compositae from Tibet and Barrow, Arctic, namely Artemisia L., Erigeron L., Saussurea DC., and Senecio L..是什么意思_Investigation and comparison of pollen grains have been made for four genera of Compositae from Tibet and Barrow, Arctic, namely Artemisia L., Erigeron L., Saussurea DC., and Senecio L..在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句