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.
性情温和的斯坦利变了，成了充满信心、笑口常开的英雄。Mild-mannered Stanley morphs into a confident, grinning hero.斯坦利·庇亚斯讲话时唾沫纷飞.Stanley Pierce spits when he talks.斯坦利抹了抹胡子--他的小胡子还是稀稀拉拉的,尽管经常修理, 还是不太整齐.Stanley fingered his mustache, which was stil...
We strolled past tinkling fountains and perfumed gardens.我们漫步经过泉水叮咚的喷泉和芬芳四溢的花园。'I go through no streets and past no fountains.“ 我不从街上走,也不从泉水过.Both fountains were going furiously and both pumps bailing with might and...
墨镜有效地阻隔强光保护眼睛.Dark glasses is an effective shield against the glare.举起一张报纸阻隔. 你觉得较凉爽 吗 ?Hold a newspaper in between. Do you feel cooler?南非被阻隔于奥运会外达32年.Pretoria was barred from every Olympic competition for 32 years....
Send a cheque for £18.99 plus £2 for postage and packing.请寄上18.99英镑的支票，外加2英镑的邮资和包装费。Proof of postage will not be accepted as proof of receipt.邮资单据不能当作收据。For foreign orders postage is extra.国外订单邮费另计。...