emission

B2 CET-4 Oxf 5000 大学 FREQ #31213 ★★☆☆☆

n. 发射, 射出, 发行 [医] 发射, 遗精

发音

UK /ɪˈmɪʃən/
US /ɪˈmɪʃən/
UK /ɪˈmɪʃn̩/
US /ɪˈmɪʃn̩/
IN /ˈɛmɪʃən/
IN /ɪˈmɪʃən/

词形变化

emissions 复数

释义与例句

n. B2 Oxf 5000
  1. 1.

    Something which is emitted or sent out; issue.

    排放

    可数 不可数

    the emission was mostly blood

  2. 2.

    The act of emitting; the act of sending forth or putting into circulation.

    放射

    发射

    可数 不可数

    the emission of light from the sun

    the emission of heat from a fire

  3. 1.

    A show; a program.

    媒体 非母语英语

词汇关系

名词

同义词 3

discharge expelling emanation

上位词 10

stuff release material activity flow flowing emergence egress bodily function bodily process

下位词 10

period flow radiation discharge evacuation elimination radioactivity venting ejaculation menstruation

相关短语

emission line [化] 发射谱线 emission lines emission theory emission nebula emission nebulas emission nebulae emission allowance emission allowances emission spectrum [化] 发射光谱 [医] 发射光谱 emission spectrums emission spectra field emission microscopy field emission microscope 【电子学】场致发射显微镜[参较 field-ion microscope] stimulated emission depletion microscope stimulated emission depletion microscopy

词源

First attested in 1607. From Middle French émission, from Latin ēmissiō (“sending forth”), from ēmittō (“send out”), from ex (“from, out of”) + mittō (“send”).

来源：wiktionary