Hilum locates at the bottom, near ventral surface of seed, or at the bottom of seed, ovate or elliptic, depressed.是什么意思_Hilum locates at the bottom, near ventral surface of seed, or at the bottom of seed, ovate or elliptic, depressed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句