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.The synthesis of ν - curcumene was described. The experiment affirmed that ν - curcumene can aromatize to α - curcumene readily at room temperature....
It's rude to put out your tongues at people.对人吐舌头是不礼貌的.He is in rude health and can cycle 40 or 50 miles non-stop.他体格强壮，能连续骑车四五十英里。It will come as a rude shock when their salary or income-tax refund cannot be cashed...
A timely bingo win brought some cheer to Juliet Little's family yesterday.昨天玩宾戈赢了一把，适时地给朱丽叶·利特尔一家带来些许的欢快心情。The computer program searches, and bingo! We've got a match.电脑程序在搜索，瞧！找到匹配的了。The local cinema has been ...