醇和醛兩者為氧化的次級(jí)產(chǎn)物.Both the alcohols and aldehydes are secondary products of the oxidation.當(dāng)次級(jí)電路開(kāi)路時(shí), 鐵芯磁通量?jī)H僅由初級(jí)電流產(chǎn)生.When the secondary circuit is open, the core flux is produced by the primary current only.群系可以按其優(yōu)勢(shì)物種的特征劃分為一些次...