在交通事故中，当事人应该报警。

Zài jiāotōng shìgù zhōng, dāngshìrén yīnggāi bàojǐng.

In a traffic accident, the parties involved should call the police.

由于当事人不在现场，我们暂时无法了解全部情况。

Yóuyú dāngshìrén bú zài xiànchǎng, wǒmen zànshí wúfǎ liǎojiě quánbù qíngkuàng.

Since the person involved is not present, we are temporarily unable to understand the whole situation.

法官要求当事人如实陈述事情经过。

Fǎguān yāoqiú dāngshìrén rúshí chénshù shìqíng jīngguò.

The judge asked the parties involved to truthfully state what happened.