The abundance and species number of pteropods changed seasonally.The abundance of pteropods was higher in 2004 than in 2005, and higher in summer than in winter.是什么意思_The abundance and species number of pteropods changed seasonally.The abundance of pteropods was higher in 2004 than in 2005, and higher in summer than in winter.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句