英漢例句雙語例句V and N. And I'll just write the result.N不變，我衹是寫出結(jié)果。If I take dQ / d beta, keeping V and N constant, then I get derivative with respect to beta.求導(dǎo)數(shù)dQ/dβ,同時(shí)保持V和N不變，就得到了對β的導(dǎo)數(shù)。Accordingly, the I-V characteristics of N and P type DBRs due to three kinds of current mechanisms:the drift-diffusion, pure drift and thermionic emission currents, have been analyzed theoretically.竝以此爲(wèi)依據(jù)，從理論上分別分析和比較了多子漂移擴(kuò)散、純漂移和熱電子發(fā)射電流機(jī)制所起的作用。v n i更多例句詞組短語短語V I N 一個(gè)很好的例子是一個(gè)車輛識別號碼v n i更多詞組