diagram n.图表；图解
    draw a diagram showing how the machine works.绘图说明机器如何运转.
    flow-process diagram 流程图

    dial n.刻度盘, 钟面, (自动电话)拨号盘
    v.拨
    dial-in n. 拨入
    dial-out n. 拨出
    digital display dial 数字显示盘

    dictation n.听写, 口述
    We´ll have dictation today.
    我们今天要听写了。

    difference n.差别，差异；差额

    direct adj.径直的, 直接的
    vt.指向, 指挥, 管理, 导演
    "Excuse me, can you direct me to the station?"
    "对不起,你能不能告诉我去火车站怎么走?"

    direction n. 方向；指令；（pl.）用法说明
    Full directions inside.内附详细说明书。
    give directions予以指示
    in all directions四面八方; 各方面
    in the direction of朝 ... 方向

director n.主管，主任；董事；导演

    dirty adj.肮脏的, 卑鄙的, 下流的
    dirty language 淫秽的语言
    a dirty trick 卑鄙的伎俩
    Those young people often sat in the cafe around the corner drinking and telling dirty stories.
    "那些年青人常常在拐角的咖啡馆里,边喝酒边讲下流故事。"

discharge vt.放出；排出；发射
    n 放出；排出；释放
    a discharge of electricity 放电器
    The water pipe doesn´t discharge freely.
    水管排水畅通。
    The stove chimney discharged dark smoke.
    火炉的烟囱冒出黑烟。
    The prisoners were glad to get their discharges.
    犯人们获释都很高兴。

    disclose vt.揭露, 透露
    The president disclosed the fact that he was put into prison wrongly twenty years before.
    董事长透露说他自己在二十年前曾被冤枉地送进监牢。

    discount n.折扣，折价；贴现

    disguise v.假装, 伪装, 掩饰
    n.伪装
    in disguise 伪装, 化装
    make no disguise of 不掩饰
    in (under) the disguise of伪装成, 在...伪装下
    The soldiers disguised themselves by wearing white garments in the snow.在雪地里战士们穿着白色服装把自己伪装起来。
    It is impossible to disguise the fact that finance is bad.
    财政困难这一事实是无法隐瞒的。

    dishonour n./vt.拒付

    disinflation n.反通货膨胀

    dismiss vt.解散, 开除, 解职, 不考虑
    vi.(口令)解散!