Advance Mission Cost Models的用法和样例：
- The cost model depends on the state of the database server.
- It estimates the execution cost based on an internal cost model.
- The quantitative cost model had a high interpretative ability.
- Though that was his true name, it was only one of several he bore during his advance mission to infiltrate a galaxy of infidels.
- The cost model based on Euler Histogram isthe focal point of the dissertation.