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词组
  • the back of an envelope
    used to denote calculations or plans of the most sketchy kind 粗略的估算(或计划)
  • push the envelope (或 the edge of the envelope)
    (informal)approach or extend the limits of what is possible (非正式)几近极致
  • push the envelope
    To increase the operating capabilities of a technological system. 增强技术系统的运转能力
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英英词典释义
  • Noun
    1. a flat rectangular paper container for papers
    2. any wrapper or covering
    3. a curve that is tangent to each of a family of curves
    4. a natural covering (as by a fluid);
    "the spacecraft detected an envelope of gas around the comet"
    5. the maximum operating capability of a system;
    "test pilots try to push the envelope"
    6. the bag containing the gas in a balloon
行业词典
  • 医学: 包膜:包封结构或膜,病毒学中为围绕壳体的外衣,通常至少部分是由宿主细胞构成的。在细菌学中则兼指细胞壁与质膜;
    昆虫学: 发育膜;囊膜;被膜;外膜;
    生物学: 包膜;又称 :包膜(peplos );
    电力: 包络线;[curve];
    电子学: 包络;