使命已经达成，现场任务已经结束，瞬息间生与死的抉择已经作出。

The mission was over, the field work ended, the split-second, life-and-death decisions made.

三只赫斯基狗包围了巴克，瞬息间便咬破了他的头和肩膀。

Buck was beset by three huskies, and in a trice his head and shoulders were ripped and slashed.

“哎呀，你什么都不明白，你甭说蠢话，你听着。”娜塔莎怀着瞬息间的懊恼的心情说。

"Oh, you don't understand; don't talk nonsense; listen, " said Natasha, with momentary annoyance.