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The stationary phase is the substance which is fixed in place for the chromatography procedure.A molecular sieve is a material containing tiny pores of a precise and uniform size that is used as an adsorbent for gases and liquids.When the mobile phase is gas, it is called eluant gas.The mobile phase is the phase which moves in a definite direction. In statistics, normalization refers to the division of multiple sets of data by a common variable in order to negate that variable's effect on the data, thus allowing underlying characteristics of the data sets to be compared.Microinjector is a kind of injector which can make injection in a very small volumn. An injector, ejector, steam ejector or steam injector is a pump-like device that uses the Venturi effect of a converging-diverging nozzle to convert the pressure energy of a motive fluid to velocity energy which creates a low pressure zone that draws in and entrains a suction fluid and then recompresses the mixed fluids by converting velocity energy back into pressure energy. Injection is a method of putting sample into the column with a syringe or injectorThe retention time is the characteristic time it takes for a particular analyte to pass through the system (from the column inlet to the detector) under set conditions. The area of a peak is called peak area.
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12个月份的英语单词分别是：January，February，March，April，May，June，July，August，September，October，November，December。
1、英语单词的产生是汉英两种语言双向交流的产物，一些带有中国特色的名称和概念进入了英语词汇，同时还有一些英语词汇进入了汉语，在文化环境中衍生出新的含义，形成了英语词汇的语义文化特征。
2、在旧石器时代的早期，人类就已经会依据月相来计算日子。迄今，朔望月仍是许多历法的基石。一年分为12个月；中国农历一年也为12个月，农历的闰年为13个月，多出的一个月称为闰月。
扩展资料：
1、April，罗马的4月，正是大地回春、鲜花初绽的美好季节。英文4月April便由拉丁文Aprilis（即开花的日子）演变而来。
2、July，罗马统治者朱里斯·凯撒被刺身亡后，著名的罗马将军马克·安东尼建议将凯撒大帝诞生的7月，用凯撒的名字——拉丁文Julius（即朱里斯）命名之。这一建议得到了元老院的通过。英语7月July 由此演变而来。
3、September，老历法的7月，正是凯撒大帝改革历法后的9月，拉丁文 Septem是“7”的意思。虽然历法改革了，但人们仍袭用旧名称来称呼9月。英语9月September，便由此演变而来。
4、october。英语10月，来自拉丁文 Octo，即“8”的意思。它和上面讲的9月一样，历法改了，称呼仍然沿用未变。
参考资料：百度百科_月份 百度百科_英语单词
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