横切面

zài héng qiē miàn shang cì shēng rèn pí bù de miàn jī bǐ cì shēng mù zhì bù dà de duō

在横切面上，次生韧皮部的面积比次生木质部大得多。

In the transection section, the area of secondary phloem is much larger than secondary xylem.