俄语在学校课程设置中是一门必修的外语课。Russian is the one compulsory foreign language on the school curriculum.某些课程是必修的，其他是选修的。Certain courses are compulsory, others are optional.三个科目是必修的, 即英文, 数学和历史.Three subjects must be taken, viz., Eng...
He is obsessional about tidiness.他过分爱干净.She is obsessional about cleanliness.她有洁癖。She became almost obsessional about the way she looked.她对自己外表的关注近于强迫。Obsessional personalities commonly ruminate excessively about death.有...
双壁钢围堰是桥梁深水基础施工的重要设施.Double - wall steel cofferdam is the important facility of bridges deepwater foundation.二是临时围堰及后方陆域连接工程.The other part is temporary cofferdam and the rear land - based connection project.临时附属工程主要是临时围堰...