they need to be
Il faut les bloquer face à nous.
We need to block them from facing us.
— Avengers : Infinity War (2018)
They need to be replaced.
Avant de fermer le portail, il faut les contenir.
Before closing the gate, they must be contained.
— Avengers (2012)
Il faut les coincer de façon subtile.
You have to trap them in a subtle way.
Si vous voulez que les plantes poussent, il faut les arroser.
If you want plants to grow, you have to water them.