main lateral veins 1- or 2-paired, the upper sometimes forming distinct intramarginal vein, tertiary reticulation faint or invisible;是什么意思_main lateral veins 1- or 2-paired, the upper sometimes forming distinct intramarginal vein, tertiary reticulation faint or invisible;在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句