短語詞組短語wave field upward continuation 波場(chǎng)上延Potential field downward continuation 位場(chǎng)向下延拓potential field upward continuation 位場(chǎng)向上延拓wave field downward continuation 波場(chǎng)延拓wave -field continuation 波場(chǎng)延拓potential field continuation 位場(chǎng)延拓magnetic field continuation 磁場(chǎng)延拓wave field continuation 波場(chǎng)延拓 返回 field continuation