查询词典 elementary substance

The substance of this thesis is that the application of web-based learning and teaching is important in elementary and secondary school education.

本论文的主旨是：在中小学的教育领域中，网上教学的应用非常重要。

The analysis gets the result: the two methods both make out the heteromorphism InSb nanocrystals, which have different crystal lattices. There are few In and Sb elementary substance grains mixed in the samples and the ratio of two kinds of chemical elements nears to 1:1. The crystal structure of the particle which is gained in vacuum evaporation method is affected by the crystal structure of substrate surface and anneal, the size of grain is direct proportion to evaporation time.

分析得到结果表明：两种方法均制备出了多晶态的InSb纳米微粒，但晶格结构不同，样品中都混有少量的In和Sb单质颗粒，且两种元素的比均接近1：1；真空蒸镀法得到的微粒的晶态受基片表面晶格和退火的影响，颗粒的尺寸与蒸镀时间成正比；而惰性气体中蒸发法得到的微粒结晶过程与基片无关，颗粒的尺寸与惰性气体的种类和压强有关。

On elementary theory of non-thermal plasma, the mechanism of VOCs destruction was decided: under the action of activated particles (such as high-energy electrons, ozone, radicals, etc) produced by discharge reaction, a series of physical and chemical reaction will take place, the result is that harmful VOCs is decomposed into unharmful substance.

根据电晕放电等离子体的基本理论，得出了等离子体处理VOCs的机制：在放电产生的活性粒子(如高能电子、臭氧、自由基等)的作用下，发生一系列的物理化学反应，使有害的VOCs转化成无害的物质。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。