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....
Who was at the helm when the collision occurred?当碰撞发生时,谁在掌舵?Down [ Up ] with the helm!转舵背 [ 迎 ] 风开!The boat seemed very slow to answer to any movement of the helm.这只船似乎对舵的转动的反应很不灵敏....
我写下46这个数字，又画了个圆将它圈起来。I wrote down the number 46 and drew a circle around it.我因感动而写下了几句诗。I have been moved to write a few lines of verse.我转过身，在黑板上写下了题目。I turned around and wrote the title on the blackboard....