天体光谱中吸收线的存在表明﹐在某些谱线频率上辐射会被吸收﹐这种局限在谱线频率范围内的吸收称为线吸收。线吸收是由原子在分立能级之间的跃迁产生的。原子从能量为E 的低能级跃迁到能量为E (E >E )的高能级时﹐就要吸收频率为的光量子(h 为普朗克常数)﹐该频率处的辐射减弱﹐形成线吸收。实际上﹐线吸收并不严格地位于频率处﹐因为有一系列谱线致宽机制使线吸收扩展到 附近的一定频率范围内。按照吸收性质的不同﹐也可把线吸收分为真吸收和散射(见恒星大气的吸收和散射)。
网络释义专业释义
... line ==> 线路,行,系统,系列,管道,管路,直线,磁力线,涂耐火材料,线=>线路,伝送路,电线路 line absorption ==> 线吸收 line access point ==> 线路通路点 ...
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... 线性变换器;线性分层器：linear quantizer 线吸收：discrete absorption 线位错：threadi ng dislocation ...
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短语
双能X线吸收仪 Dual-energy X-ray absorptiometry ; Dual X-ray Absorptiometry ; DXA ; DEXA
紫外线吸收剂 Octyl methoxycinnamate ; UV absorber ; Butyl Methoxydibenzoylmethane ; octyl dimethy paba
线吸收法 Dual energy X-ray absorptiometry ; DXA ; DEXA ; dual X-ray absorptiomery
双能X线吸收法 dual-energy X-ray absorptiometry ; DXA ; dual X-ray absorptiomery
射线吸收 gamma ray absorption ; absorption of gamma radiation ; X-ray Absorption ; gamma absorption
紫外线吸收光谱法 ultra-violet absorption spectrometry
红外线吸收光谱学 infrared absorption spectroscopy ; Infrorot-Spektroskopie
红外线吸收器 infrared absorber ; infrared a orber
双语例句原声例句
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光子在硅线中碰撞跳跃，当触及某个特定的角度，它就被硅线吸收了。
Light bounces around within the wires and is eventually absorbed when it hits at the correct Angle.
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双能X线吸收法(DXA)测量后前位第1 - 4腰椎，左侧股骨颈、股骨干、大转子及总股骨的BMD。
BMD was measured at the posteroanterior lumbar spine 1-4, left femoral neck, femoral shaft, trochanter and total hip by dual-energy X-ray absorptiometry (DXA).
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前言： 作为骨量测量“金标准”的双能X线吸收测定法（DEXA），近几年已被国外研究学者作为身体成分测量的新标准。
DEXA, as the"Golden Standard"for bone mass measurement, has been regarded as the new standard for body composition measurement in the recent years.
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It's - a suture or a stitch has to hold the wound closed so it has to have certain mechanical strength and imagine the problem of making something that's dissolvable so it disappears but also is strong enough to hold a wound closed reliably for a length of time.
能够拉紧切口的缝合线,就必须具有一定的机械张力,大家想像一下制造这种缝合线的难度,身体组织不仅要能吸收这种缝合线,而且这种线必须有足够的张力,一定时间内能够拉紧切口
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