a preconcerted plan的用法和样例：
- Through the training and testing of lots of studied samples, the error of the model is limited in a preconcerted range.Thus, a integrative network model has been established.
- I bought a run-down farm house and plan to fix it up.
- The police worked out a plan to catch the thief.
- The intelligence-gathering satellite, which was launched at 1:35 p.m. (0435 GMT), has separated from the rocket and been sent into a preconcerted orbit as planned, the agency said.
- The plan grew out of a casual conversation.