例句與造句

1. Already now the mass-generation follows the same principle as above, namely from the existence of a finite expectation value | \ langle \ phi \ rangle |, as described above.
2. But then there's a more basic issue : if you can " ignore " infinities with vacuum energy, saying only differences in energy are measurable, then why is some finite expectation value of it supposed to be meaningful?
3. Let " X " be a random variable that takes values in a " p "-dimensional Euclidean space with probability distribution and let " Y " be a random variable that takes values in a " q "-dimensional Euclidean space with probability distribution, and suppose that " X " and " Y " have finite expectations.
4. If the sequence ( " X n " ) " n "  "  ! 0 } } consists of symmetric random variables taking the values and, then is bounded, but the martingale and the predictable process are unbounded simple random walks ( and not uniformly integrable ), and Doob's optional stopping theorem might not be applicable to the martingale unless the stopping time has a finite expectation.
5. It's difficult to find finite expectation in a sentence. 用finite expectation造句挺難的