到达机场后，我们需要登记。

Dàodá jīchǎng hòu, wǒmen xūyào dēngjì.

After arriving at the airport, we need to register.

婚礼前，新人需要登记结婚。

Hūnlǐ qián, xīnrén xūyào dēngjì jiéhūn.

Before the wedding, the couple needs to register for marriage.

婚宴的座位安排需要登记。

Hūnyàn de zuòwèi ānpái xūyào dēngjì.

The seating arrangement for the wedding banquet needs to be registered.