廉价是聚酯树脂受到欢迎的主要原因之一.Cheapness is one of the main attractions of polyester resins.将聚酯, 聚已酸乙稀酯从反应器中拿出来.The polyester , polythylene adipate, was removed from the reactor.经过多番实验, 终于找到了一种确能把它们转换成结实的聚酯的方法.After much experimenti...
In autumn 1944 the allies invaded the Italian mainland at Anzio and Salerno.1944年秋，盟军从安齐奥与萨勒诺攻入意大利本土。In autumn 1944 the allies invaded the Italian mainland at Anzio and Salerno...1944 年秋，盟军从安齐奥与萨勒诺攻入意大利本土。The Germans wer...
He walked towards the summerhouse, at first furtively, then with more confidence.他朝凉亭走去，开始还偷偷摸摸地，后来就壮大了胆子。He glanced furtively at the stolid faces of the two detectives.他偷偷地瞄了一下两名侦探面无表情的脸孔。At this some of the others furt...