Secondary xylem consists of pitted vessels, parenchyma fibers and rays.

　　次生木質(zhì)部由孔紋導(dǎo)管、薄壁組織及射線所組成。

　　The xylem of ferns and conifers contains only tracheids.

　　蕨類(lèi)植物和針葉樹(shù)的木質(zhì)部?jī)H含有管胞。

　　Study on the environment problem and countermeasure of xylitol industry in China

　　中國(guó)木糖醇行業(yè)環(huán)境問(wèn)題和對(duì)策研究

　　Determination of Xylitol Content in Foods Using High Performance Ion Exchange Chromatography

　　離子排斥液相色譜法測(cè)定食品中木糖醇的含量

　　Basically they use different types of Africans Traditional music instruments such as xylophone made out of wood and Djimbe drum.

　　樂(lè)團(tuán)表演所用的樂(lè)器基本立足于非洲各式各樣的傳統(tǒng)打擊樂(lè)器，如用硬木雕挖的木琴，世界聞名的金杯鼓等。

　　Percussion instrument ( eg drum, tambourine, xylophone)

　　打擊樂(lè)器（如鼓、鈴鼓、木琴）。