以下为句子列表：
英文: Based on the assumption that with the upper part fixed the structure possesses classic normal modes, analysis procedure is deduced when the stracture is under earthquake excitation.
中文: 基于上部结构固定时具有正则振型的假设下，推导下地震激励作用下，土－结构动力相互作用对基础隔震结构影响的频域模态分析的步骤。
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英文: Quantitative analysis procedure of lignocellulose solid substrate including hemicellulose, cellulose and lignin, ignition method, volumetric method and soak extract method were utilized to study the changes of chemical components in lawn-grass and weeds d
中文: 摘要运用木质纤维素固体基质半纤维素、纤维素和木质素定量分析程序等分析检测了不同湿解工况下草坪草和杂草主要组分的化学变化。
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英文: The quantitative analysis procedure was established by using hyminal as internal standard.
中文: 以安眠酮作内标,建立了定量分析程序。
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