This course teaches the driver to improve his observational skills so that he can spot potential dangers.这门课程教司机提高观察技能, 以便发现潜在的危险。

The series 'Seinfeld' is observational humour at its best.系列剧《宋飞正传》极形象地展示了观察到的幽默。

data from a large observational study of 4,860 cases of acute otitis media从对4,860例急性中耳炎进行的大型科学观察研究中获得的数据

an observational astronomer进行科学观测的天文学家

The observational work is carried out on a range of telescopes.观测工作借助于各种望远镜。