At 240 mph the needle went off the clock.车速达到每小时240英里时，里程表上的指针显示超出了最高时速。A speed limit of 30 mph was introduced in built-up areas.在建筑密集区域，车速限制为每小时30英里。Inside these zones, traffic speeds are restricted to 20 mph.在这些区域内，交通限...
He was driving a Mercedes racer at 100 mph and almost came to grief.他当时驾驶着一辆梅塞德斯赛车以每小时100英里时速度飞驰，险些出事。It would be hypocritical to say I travel at 70mph simply because that is the law.如果因为法律规定的时速是70英里我就说自己的车速是这么高，那就是虚伪了。A...
大部分钱都存放在银行的保险库里。Most of the money was in storage in bank vaults.小心存放，因为它们很容易被碰伤。Be sure to store them carefully as they bruise easily.有几类花园家具冬季必须存放在室内。Some types of garden furniture must be stored inside in the winter....
Twelve potential vaccines are currently being tested on human volunteers.目前正在人类志愿者身上试验12种试用疫苗。Anti-malarial vaccines are now under-going trials.抗疟疾的疫苗正在试验阶段。His team are at the forefront of scientific research into vacci...
溶源性细胞与敏感细胞还有两点重要区别.Lysogenic cells differ from sensitive cell in two other important respects.溶源性是噬菌体和寄生染色体之间的半永久联合.Lysogeny is a semi - permanent association between the phage and host chromosomes....