The theoretical result is in good agreement with the experimental result, proving that FEM is an effective way to study sonic field in fluid filled borehole in the complex formation.

数值计算结果与实验结果具有很好的一致性。结果表明，有限元素法是研究复杂地层充液井孔中声场的有效工具。

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METHODS By EDTA complex formation titration.

方法采用EDTA络合滴定法。

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Furthermore, the reaction mechanism has been studied, and the complex formation constant between NewMagenta and DNA was obtained from the UV-Vis spectra.

同时，对该反应机理进行了探讨，并用紫外-可见光谱求出了其形成常数。

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One key element in searching for life on Mars is the presence of methane in the Martian atmosphere As a simple carbon compound, methane is often a precursor to the formation of the complex organic chemicals that make life possible.

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LaPierre stood alone, looking angry and inflexible discussing a complex issue at an extremely delicate time in the formation of public opinion.

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