我该穿常礼服,还是燕尾服?Am I to wear a dinner - jacket or tails?他穿着常礼服, 他的官职金项圈挂在脖子上.He was dressed in his official morning coat, with his chain of office about his neck....
Lignite oil is creosote derived from lignite tar.褐煤油是从褐煤中得来的防腐油.Therefore, the conventional gas content measurement is invalid to lignite.因此, 传统的煤层气含量确定方法不适用于褐煤.We use the best lignite or peat, activity humic acid sodium...