常見(jiàn)例句雙語(yǔ)例句The dichroism kinetic curve of fulgide film was theoretical calculated according to first-order approximation formulae.用一階近似理論計(jì)算了俘精酸酐樣品二向色性隨曝光量變化曲線。Under the first-order approximation of Taylor expansion, the analytic expression for the defect mode frequency is derived, from which the coupling factor is deduced.利用泰勒展式的一級(jí)近似，得到了缺陷模頻率的解析表達(dá)式，進(jìn)而得到緊束縛理論中的耦合因子。Based on principal state of polarization theory and first-order approximation, an analytical expression of signal degree of polarization(DOP) depending on polarization-mode dispersion(PMD) was given.依據(jù)主偏振態(tài)理論和一階偏振模色散（PMD）近似，給出了信號(hào)偏振度（DOP）與PMD的解析關(guān)系式。 返回 first-order approximation