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if-modified-since中文什么意思

发音:   用"if-modified-since"造句
  • 从何时更改
  • if:     If they had only arriv ...
  • modify:    vt. 变更;修改;减轻,缓和,调节;限制;【哲学】规定 ...
  • since:     ★ 1. 主句中动词用现在完成式时, sin ...
  • since:     ★ 1. 主句中动词用现在完成式时, since 所引导的子句须用过去式: We have both changed since we parted. 分别以来彼此都变了。 2. 主句主语为 it, 动词用现在[过去]式时, since 引导的子从句须用过去[过去完成]时: It is two years since we parted. 我们分别以来有两年了。 It was two years since we had parted. 那时我们已经分别两年了。 2. 因为,所以,既是。 ★在表示原因的几个连词中,语气最强的词是 because, 其次是 since, 再其次是 as, for。 because 是直接说明问话 why 的‘理由’、‘原因’。 since 是站在‘时间’立场用‘既是…就…’的意义去说明事件关系中的自然结果的;表达这一理由的 since 通常放在句首,但在省略句中也可放在句中: S- force is no remedy, let us try conciliation. 武力既不中用,就想法和解吧。 That is a useless, since impossible, proposal. 既然不可能,那就是一个没用的提议。 …以来,以后,…之后,自从。 S- seeing you I have had good news. 见面以后得到(你的)不少好消息。 since midnight 午夜之后(到此时)。 since then 其后,从此一直。 adv. 1.以后,此后,以来。 ★由前置词惯用短语 since then, since that 略去 then (时), that (事)而形成:I have not seen him since (=since then). (那时)以后没见过他。 2.(距今几年)以前;(从那时候起几年)以前。 ★由 conj. 1. 义转变成的: It is two years since (we parted).=We parted two years since (=ago). 我们是在两年以前分别的。 It was two years since (we had parted).=We had parted two years since (=before). 我们是在那以前两年分别的。 ever since 从那时起,此后一直。 long since 好久以前,已久。 not long since 就在不久,未久。
  • since then:    从那时以来; 其后, 从此一直; 自此之后; 自那以后
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例句与用法

  1. The if - modified - since header , which specifies that the requested operation should be performed only if the requested resource has been modified since the indicated data and time
    If - modified - since标头,指定仅当自指示的数据和时间之后修改了请求的资源时,才执行请求的操作。
  2. Demonstrates how to send the last - modified response header and check for the if - modified - since request header to avoid generating a response body and transmitting data to the client unnecessarily
    说明如何发送last - modified响应标题并检查if - modified - since请求标题,以避免不必要地生成响应正文和将数据传输到客户端。

相关词汇

        if:     If they had only arriv ...
        modify:    vt. 变更;修改;减轻,缓和,调节;限制;【哲学】规定 ...
        since:     ★ 1. 主句中动词用现在完成式时, sin ...
        since:     ★ 1. 主句中动词用现在完成式时, since 所引导的子句须用过去式: We have both changed since we parted. 分别以来彼此都变了。 2. 主句主语为 it, 动词用现在[过去]式时, since 引导的子从句须用过去[过去完成]时: It is two years since we parted. 我们分别以来有两年了。 It was two years since we had parted. 那时我们已经分别两年了。 2. 因为,所以,既是。 ★在表示原因的几个连词中,语气最强的词是 because, 其次是 since, 再其次是 as, for。 because 是直接说明问话 why 的‘理由’、‘原因’。 since 是站在‘时间’立场用‘既是…就…’的意义去说明事件关系中的自然结果的;表达这一理由的 since 通常放在句首,但在省略句中也可放在句中: S- force is no remedy, let us try conciliation. 武力既不中用,就想法和解吧。 That is a useless, since impossible, proposal. 既然不可能,那就是一个没用的提议。 …以来,以后,…之后,自从。 S- seeing you I have had good news. 见面以后得到(你的)不少好消息。 since midnight 午夜之后(到此时)。 since then 其后,从此一直。 adv. 1.以后,此后,以来。 ★由前置词惯用短语 since then, since that 略去 then (时), that (事)而形成:I have not seen him since (=since then). (那时)以后没见过他。 2.(距今几年)以前;(从那时候起几年)以前。 ★由 conj. 1. 义转变成的: It is two years since (we parted).=We parted two years since (=ago). 我们是在两年以前分别的。 It was two years since (we had parted).=We had parted two years since (=before). 我们是在那以前两年分别的。 ever since 从那时起,此后一直。 long since 好久以前,已久。 not long since 就在不久,未久。
        since then:    从那时以来; 其后, 从此一直; 自此之后; 自那以后
        modified:    变更的; 变形的; 变性的;改性的; 改变的; 改进的; 改良的; 改质松香酯; 修订的; 修改的; 修正的
        not modified:    未被修改; 未修改
        since from since:    和完成时连用; 指从过去到现在的一段时间
        ever since:    此后一直,从那时侯起一直; 从……起一直到现在; 从那时到现在; 从那时起,自那时以来; 从那时起,此后一直; 从那时起,自那时以后; 从那时起一直到现在; 从那以后(一直); 自从那时起一直; 自那时起一直到现在; 自那时起直到现在
        long since:    从前; 很久以前, 早已; 很久以前;很久以来
        not long since:    就在不久
        now that = since:    既然
        now that=since:    既然
        since because as:    等原因
        since leave:    自从离别后
        since participate in:    参加九次
        since that time:    从那时候
        since when:    什么时候开始的
        since; because:    因为
        modified modified frequency modulation:    改进的改进频率调制
        modified-modified frequency modulation:    改进的改进调频制
        modulation modified modified-frequency:    改进修改频率调制
        and since i was in town:    又正好身在城中
        and since to look at things in bloom:    因我要看缤纷的世界
        because as since now that because:    语气最强

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