They stood firmly [=steadfastly, solidly] behind their boss.他们坚定地支持他们的老板。

He pulled the hat down firmly over his ears.他把帽子拉下来将耳朵捂得严严实实的。

I firmly [=strongly] believe in the value of exercise.我坚信锻炼身体的价值。

She's got her feet firmly (planted) on the ground. [=she is a practical and sensible person]她是个脚踏实地的人。