non-speculative  
adjective (also nonspeculative) uk/ˌnɒnˈspek.jə.lə.tɪv/ us/ˌnɑːnˈspek.jə.lə.t̬ɪv/
  (NOT GUESSING)      
  非臆想的;从事实出发的
based on information rather than on a guess
  The statement was unambiguous and non-speculative.
 I have tried to explain how these forces work by using purely mathematical and nonspeculative terms. 我试图通过使用纯数学和非推测的术语来解释这些力是如何作用的。 
 - More examples
 - He was an early pioneer of the non-speculative approach to philosophy.
 
  (TRADE)      
 非投机性的
not involving speculation (= buying and selling because you hope that the value of what you buy will increase and it can be sold at a profit)
  This type of asset is best suited for people making long-term, non-speculative investments.
 They made the transactions for non-speculative purposes. 他们出于非投机目的进行交易。 
 - More examples
 - The bank said that it bought the shares for legitimate, nonspeculative purposes.
 - These bonds are not suitable for non-speculative investors.