我对所有这些药物的危险性了如指掌。I've read up on the dangers of all these drugs.科学已经探明其危险性非常小。Science has determined that the risk is very small.一些发言者认为拳击的危险性比橄榄球运动小。Some speakers argued that boxing was less dangerous than rugby....
将近60年以来,民用的无线电广播一直用的是长波.Commercial radio broadcasters have used long waves for nearly 60 years.和民用的隐私权的美德,是夸大了, 他补充说.And Cuil's privacy virtues are exaggerated, he adds.低压限流断路器是广泛应用于工业与民用的低压电器.Low - voltage current ...