代 [书] （什么； 怎么） what；

[例句] 医疗当局对其病因及有多致命都还不甚了解。 Medical authorities were baffled, both as to its causes and its virulence.

[例句] 这位报界大亨和英国的显贵达人们交情甚好。 The press mogul befriended the high and mighty in Britain.