Leonard made a rapid calculation: he'd never make it in time.伦纳德快速盘算了一下：他肯定赶不上了。Graham made a quick mental calculation.格雷厄姆很快就心算出来了。He is absorbed in the calculation of that difficult maths problem.他全神贯注地在算那道数学难题....
By contrast, the comparable figure for the Netherlands is 16 per cent.相反，荷兰的相对数字为16%。The Netherlands has been reclaiming farmland from water.荷兰人一直在围海造地。Radio Netherlands, PO Box 222, Hilversum希尔弗瑟姆邮政信箱222号，荷兰广播电台...
商业上采用的以镍作催化剂的氢化有两种.Commercially two main types of hydrogenations are carried out with Nickel catalyst.抑制剂和促进剂能影响氢化速率.Inhibitors and promoters may affect the rate of oxxidution.用六氢化邻苯二酸酐加入到邻苯二酸酐中,可使其放热反应减慢.Exothermic reac...