The source process of partial area pre-displacement is finite moving source and that of whole area pre-displacement is combination of finite moving source and instantaneous source.

局域预位移的震源过程为有限源传播，全域预位移为有限源与瞬时面源。

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Higher order waves generated by a moving source in a two-layer inviscid, incompressible fluid of finite depth with small density difference were studied.

研究了运动点源在无粘、不可压且具有小密度差的两层有限深流体中生成的高阶波动。

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