These murder birds were one-of-a-kind in avian history.

在鸟类历史上，这种杀人鸟是独一无二的。

From 1969 to 2001, the US government murdered over 12 billion birds in the American skies.

自 1969 年至 2001 年，美国政府杀死了美国天空中超过 120 亿只鸟类。

From 1969 through 2001, the US government murdered over 12 billion birds in the American skies.

从 1969 年到 2001 年，美国政府在美国天空中杀害了超过 120 亿只鸟类。

Lichtman: These murder birds were one-of-a-kind in avian history.

Lichtman：这些杀人鸟在鸟类历史上是独一无二的。

It seemed doubtful that Fred, the gentle Shepherd, murdered the bird or that Babe, my loud Lab, had done likewise since there was no blood.

弗雷德，温柔的牧羊人，谋杀了那只鸟，或者贝贝，我大声的拉布拉多，也做了同样的事，因为没有血，这似乎令人怀疑。