The synthesis of ν - curcumene was described. The experiment affirmed that ν - curcumene can aromatize to α - curcumene readily at room temperature.用金属锂 - 液氨一步还原法合成γ姜黄烯.实验证实γ姜黄烯极不稳定,室温下极易芳香化转变成α姜黄烯....
用拖拉机牵引的喷雾器可以将5加仑药水喷洒在10英亩田地上。A sprayer hooked to a tractor can spray five gallons onto ten acres.霍格沃兹特快并不是蒸汽牵引的列车.The Hogwarts Express is not really a steam train.同时针对甬台温客运专线铁路特点,提出了选择DN还 是AT方式作为甬台温铁路电力牵引的供电方式.Simultaneo...