小鼠和鸡分别经电穿孔和肌肉注射免疫两次，间隔为3周。

The mice and chickens were immunized twice, 3 weeks apart, by electroporation into muscles or intramuscular injection.

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小鼠和鸡分别经电穿孔和肌肉注射免疫两次，间隔为3周。

The mice and chickens were immunized twice, 3 weeks apart, by electroporation into muscles or intramuscular injection.

youdao