chemical background meaning in English

化学背景

Actual chemical background news for your customers
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Having over 3 years working experience on electrical maintenance in plant . with chemical background is preferred
具有三年以上工厂电气维护经验。有化工行业背景者优先。
College or above degree with fluent english to communicate with foreign clients / suppliers . chemical background is preferred
大专或以上文化，英语流利，能和国外客户或供应商充分交流，化工行业优先
The solution background that resulted from the chemical interference , would be the primary factor that effected the sensitivity . especially in the present microfluidic system , the chemical background which was usually inevitable because of the carrier solution , would be eliminated by means of using air as the carrier flow , thus a great signal noise ratio ( snr ) and a great sensitivity could be obtained
在微量分析和超微量分析里，化学干扰产生的溶液背景是影响灵敏度的主要因素，尤其在微流控系统中，载流溶液的背景不可避免，用空气作载流就可以消除背景而获得高信噪比和高灵敏度。