在这个案件中，所有的当事人都需要出庭作证。
zài zhègè ànjiàn zhōng ， suǒyǒu de dāngshì rén dū xūyào chūtíng zuòzhèng 。
In this case, all parties involved must appear in court to testify.
当事人之间的协议必须得到所有人的同意。
dāngshì rén zhījiān de xiéyì bìxū dédào suǒyǒu rénde tóngyì 。
The agreement between the parties involved must be approved by everyone.
律师会联系当事人，了解他们的具体情况。
lǜshī huì liánxì dāngshì rén ， liǎojiě tāmen de jùtǐ qíngkuàng 。
The lawyer will contact the parties involved to understand their specific situation.