值班的护士担心病人的病情会恶化.The nurse on duty was fearful that the patient should get worse.那些值班的官员明显不能自持, 许多人都流出了眼泪.The officers on duty were visibly overcome, many of them in tears.他就是那个值班的人.He is the man on watch....
The two principal combustion products are water vapor and carbon dioxide.两种主要的燃烧产物是水蒸气和二氧化碳。Soot is the product of the imperfect combustion of fuel.煤烟是燃料不完全燃烧的产物.Soot is usually the product of the imperfect combustion of...