他打算和青年人谈谈艾滋病的危害。He intends to talk to young people about the dangers of AIDS.快上大学的青年人受到征召。Youngsters coming up to university were being called up.在电脑行业工作的聪明的青年人bright young things working in the computer business...
Causes for the corrosion leakage of interstage coolers of a chlorine gas compressor were analyzed.分析了氯气压缩机段间冷却器腐蚀泄漏原因,介绍了超声波防垢原理及其实施效果.The paper also points out the condition of the best interstage of the forging.并指出了最佳锻...