对英国200米纪录发起的3次冲击也均以失败而告终。Three attempts on the British 200-metre record also ended in failure.他们的目标是冲击世界纪录。They have set their sights on the world record.暴乱中，警察挥舞着警棍对人群发起冲击。Police in riot gear baton-charged the crowd....
A formal contract is signed which is renewable annually.正式签订了每年可续签的合同。Seven million doses of vaccine are annually given to British children.英国孩子每年要接种7百万剂疫苗。El Salvador produces 100,000 tons of refined copper annually.萨尔瓦...
And a high molecular weight poly ( arylene ether nitrile sulfone ) has obtained.获得了高分子量的 聚芳醚 腈砜.BUNa - N is a general purpose oil resistant polymer known as nitrile rubber.丁腈橡胶(BUNa-N )是一种多用途抗油品腐蚀聚合物,称为腈橡胶.Organic cyanid...