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.
想象一下中个5,000英镑的当地彩票头奖吧。Imagine winning the local lottery first prize of £5,000.她买了张彩票，中了3,300多万美元。She bought a lottery ticket and won more than $33 million.这张彩票没中奖.The ticket has drawn no prize....
They brought home heaps of travel brochures.他们将成堆的旅行手册带回家.The machine flung up great heaps of earth.这台机器抛起了大片的土.It was surrounded with heaps of combustible materials.它周围是一堆易燃物质....