简单地说,这不是一个定语从句,如果你要用which,那么,就把describing改为describes,也就是改为动词谓语就可以了.
而用one,则是用作同位语,也就是指代story,用来进一步解释的.
后面的describing短语用作定语,修饰one
=Ang lee's won another OSCAR for directing life of pi telling an amazing story ,a story describing an Indian boy and a tiger on a life craft in the Pacific.
Ang lee's won another OSCAR for directing life of pi telling an amazing story ,which describes an Indian boy and a tiger on a life craft in the Pacific.