It unlocks the many mysteries of orca's life and death.

它揭示了许多虎鲸生活和死亡的奥秘。

Well, never mind, John, it's not a matter of life and death.

好了，别介意，约翰，这不是多么了不起的事情。

The little girl lay between life and death.

那小女孩生命垂危。

The little sick girl lay all night between life and death until her fever was gone.

这个生病的小姑娘整夜躺在床上，处于生死关头，直到退烧才脱险。

This was a matter of life and death.

这是有关生活和死亡的事。