管道的等量长度中的摩擦损失即构成弯管中的压力损失.Friction losses in the equivalent lengths of ducts constitute the pressure loss in the elbow.对小半径弯管国产化的可行性,作了技术论证.The feasibilities of small - radius pipe - bender made in china are demonstrated ...
His face was wreathed in smiles.他满脸笑容。The girls watched, little teasing smiles animating their faces.女孩们注视着，脸上挂着调皮的微笑，显得愈加活泼。His expression is as earnest when he smiles as when he is arguing...他不论笑的时候还是争论的时候表情都同样真诚。My bo...
She spread pieces of bread on the counter and began buttering them.她把几片面包摆在台上，开始抹黄油。I tried buttering her up. "I've always admired people with these sorts of talents."我拼命奉承她：“我一直钦佩有如此才能的人。”He's probably butteri...
...a whole range of crimes and delinquencies.各种违法犯罪行为This study tries to discuss juvenile delinquencies through the angle of sex difference.本次研究试图从越轨行为的性别差异的角度,探讨青少年越轨问题.Not all delinquencies lead to foreclosure.并不是所有未按时...