自最初报告以来，仍然限于西伯利亚的俄罗斯家禽中H5N1暴发已逐步向西传播，影响6个行政区。

Since the initial reports, the Russian H5N1 outbreak in poultry, which has remained confined to Siberia, has spread progressively westward to affect 6 administrative regions.

youdao

自最初报告以来，仍然限于西伯利亚的俄罗斯家禽中H5N1暴发已逐步向西传播，影响6个行政区。

Since the initial reports, the Russian H5N1 outbreak in poultry, which has remained confined to Siberia, has spread progressively westward to affect 6 administrative regions.

youdao