在尝试爬下去之前，确保绳子牢固地系好。

Make sure the rope is ___firmly attached before attempting to climb down it.

我缓慢但坚定地抓住门把手，又快速瞥了一眼房间，然后转动了它。

Slowly but ___firmly I grabbed the door handle, took another quick glance in the room, and turned it.

她坚信人人平等。

She ___firmly believes in equality for all.