5.modify the terms of a contract
6.put forward amendments;
7.concerned with or providing correction.
9.A Corrector Local Crank-Nicolson Method for the Equation u_t = u_(χχ) + α_u
修正局部Crank-Nicolson方法对于带低阶项的抛物型方程的应用
10.uphold the truth and correct the mistakes;