de·sid·er·a·tum /dɪˌsɪdəˈrɑtəm, ˌzɪ, ˈre-/
  所願望之物,迫切需要之物
  De·sid·e·ra·tum n.; pl. Desiderata   Anything desired; that of which the lack is felt; a want generally felt and acknowledge.
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  desideratum
       n : something desired as a necessity; "the desiderata for a
           vacation are time and money"
       [also: desiderata (pl)]