Experiment on the transesterification of jatropha curcas oil with p - toluene sulphonic acid as catalyst was studied.实验研究了麻疯树油在对 甲苯 磺酸催化剂的作用下与甲醇发生转酯化反应生成脂肪酸甲酯(生物柴油)的情况.Isopropyl p - hydroxybenzoate was synthesized with t...
Somehow Karin managed to cope with the demands of her career.卡琳设法达到了其职业的要求。Her bed was crisply made, her clothes put away.她的床收拾得很整洁，衣服也收起来了。She was afraid in a way that was quite new to her.她感到从未有过的害怕。...
She had bleary red eyes from lack of sleep.她由于缺乏睡眠而双眼昏花，布满血丝。I was hampered by a lack of information.我受到了信息不足的牵累。So many marriages have come to grief over lack of money...许多婚姻都因缺钱而以失败告终。The lack of animal, bacterial, or ...