x字母开头的单词有哪些

　　The rooms are crammed with humming Xerox machines.

　　那些房间里摆满了嗡嗡作响的.复印机。

　　Could you xerox this letter, please?

　　请复印一下这封信好吗？

　　He kept the original copy and gave her only a Xerox.

　　他保留下原件而只给了她一份复印件。

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

　　次生木质部由孔纹导管、薄壁组织及射线所组成。

　　The xylem of ferns and conifers contains only tracheids.

　　蕨类植物和针叶树的木质部仅含有管胞。