1.描述過程，流程常用句子
    the following diagraph shows the structure of……
    the picture illustrates……
    it mainly consists of……
    it works as follows.
    it always involves following steps.
    the whole procedure can be divided into…stages.
    2.描述流程，過程的常用過渡性詞語
    firstly
    secondly
    thirdly/finally
    the first step is to
    the next step is to
    the last step is to
    the first stage involves
    in the next stage
    in the following stage
    in the last stage
    first of all
    to begin with
    next
    then
    later
    at the same time
    simultaneously
    subsequently
    consequently
    before this
    during
    after this
    in the course of
    in order to/in order not to
    in order that
    so as to/so as not to
    描述流程的文章，應(yīng)說明：
    1. 首先說明是做什么工作的過程，目的是什么
    2. 準(zhǔn)備工作
    3. 按時(shí)間/過程先后描述
    4. 結(jié)果
    5. 簡單總結(jié)
    描述一個(gè)實(shí)物/器具的工作過程，文章應(yīng)分以下幾點(diǎn)：
    1. 實(shí)物是什么，做什么用的
    2. 基本結(jié)構(gòu)
    3. 工作過程
    4. 簡單總結(jié)