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....
Many of Kuwait's spacious freeways were engineered by W S Atkins.科威特有很多宽阔的高速公路是阿特金斯集团设计建造的。Los Angeles is famous for its many freeways.洛杉矶以其众多的高速公路闻名.About 25 miles per gallon on the freeways.走高速公路的话,一加仑可以跑25英里....
这条河流的水道原来很不规则.The course of this river used to be quite irregular.发电站在两条河流的汇合处.The power station stands at the junction of two rivers.它成了两条河流的分水岭.It forms the watershed between the two rivers....
Take a piece of sandpaper and round off the edges of the frame.拿张砂纸把框架的边磨圆.When assembling the pie, wet the edges where the two crusts join, to form a seal.在包馅饼时，先把两片馅饼皮边沿接头部分弄湿，再将其捏合。She evened the edges by trimming the...