fiercely

The two tech companies are fiercely competitive in the smartphone market.

(Chinese) 这两家科技公司在智能手机市场展开了激烈的竞争。

The mother bear fiercely protected her cubs from the approaching wolves.

(Chinese) 母熊凶猛地保护着幼崽，使其免受逼近的狼群伤害。