The rooms are crammed with humming Xerox machines.
那些房間里擺滿了嗡嗡作響的復印機。
Could you xerox this letter, please?
請復印一下這封信好嗎？
He kept the original copy and gave her only a Xerox.
他保留下原件而只給了她一份復印件。
Secondary xylem consists of pitted vessels, parenchyma fibers and rays.
次生木質(zhì)部由孔紋導管、薄壁組織及射線所組成。
The xylem of ferns and conifers contains only tracheids.
蕨類植物和針葉樹的木質(zhì)部僅含有管胞。