沉着地

The fighters steadily dug themselves in.

战士们挖掘战壕。

He was comparatively calm and concentrated in judging how to defeat his opponent.

他相对冷静,聚精会神判断如何打败对手。

Snape, however, looked calmly back into Voldemort's face and,  after a moment or two, Voldemort's lipless mouth curved into something like a smile.

斯内普却的回视伏魔的，过了一会儿，伏魔有嘴唇的嘴微微弯曲了一下，像是在笑。