例句與造句

1. The stems and rhizomes were observed to differ in cortex - cell layer , perivascular fiber - ring presence , vascular cylinder and pith proportions , vascular bundle number and secondary growth and these differences were associated with their own physiological functions
   地上莖和根狀莖之間在皮層細(xì)胞層數(shù)、周維纖維柱的有無(wú)、維管柱和髓所占比例、維管束束數(shù)、次生生長(zhǎng)等方面存在差異，這些差異與它們各自擔(dān)負(fù)的生理功能相關(guān)聯(lián)。
2. It's difficult to find bundle number in a sentence. 用bundle number造句挺難的