When considering body-force, free item will be arised in the equation of the boundary element method, causing boundary integration to be changed into nonlinear-integration.
边界元法在考虑体积力时要产生积分自由项，这将使边界积分成为非线性积分，从而引起实施时的困难。
If some problem arised in the performance of the contract, both parties should be to deal with them there and then.
如在本合同执行过程中出现了某些问题，合同双方应就地及时解决。
They arised with the economic development and would be resolved by the sustainable development i. e. environmental, economic and social benefits integrity principle.
这就是解决环境问题要遵循环境效益、经济效益和社会效益相统一的原则。
They arised with the economic development and would be resolved by the sustainable development i. e. environmental, economic and social benefits integrity principle.
这就是解决环境问题要遵循环境效益、经济效益和社会效益相统一的原则。
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