感染源调查显示，三位病人都与怀疑患有禽流感的家禽有过接触。

Investigations into the source of infection indicate that the three cases had exposure to poultry suspected to have avian influenza.

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海相残留盆地中，当有效烃源岩、有效储集体、有效封盖层系形成“三位一体”的有机配置时，即形成有效成藏组合。

In these basins, effective plays are established when effective source rocks, effective reservoir bod - ies, and effective covers are matched by "three units into one".

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