维埃拉介绍了事件的经过：“在赞比亚时，我们被允许参加巡逻活动，前提是万一发生射杀行为，我们同意不去指认那些参加行动的人。

Vieira introduces the scene: “We were allowed to accompany patrols in Zambia after we agreed not to identify those involved, should a shooting occur.

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经过我们的介绍，相信大家已经了解了。

After our introduction, I believe we already know.

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然而，经过多年实验，我们已经找到了新的方法，将其通过不同的形式更有效地介绍出去。

However, after years of experimentation we have found new ways to effectively introduce it in different forms.

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