During the investigation, this article uses varying methods of historic , documental, observational, conversational and questions surveyable.本文在研究中运用了历史法、文献法 、 观察法 、 访谈法和问卷调查法....his freakish voice varying from bass to s...
Eddie was a short squat fellow in his forties with thinning hair.埃迪四十多岁，矮矮胖胖的，头发日渐稀疏。He bent to a squat and gathered the puppies on his lap.他弯腰蹲下，把小狗们都抱到自己腿上。After returning from Paris, David moved to a squat in Brixton....
Most boilers have a lifespan of 15 to 20 years.绝大多数锅炉有15至20年的使用期限。The clean coal is sent to a crusher and the boilers.干净的煤送入破碎机和锅炉.Conversely, test made in full - scale boilers are usually difficult to reconcile.与此相反, 在工...