She has a fierce determination to succeed.

她有激烈的成功决心。

The lion is attacking its prey with fierce determination.

狮子正以凶猛的决心攻击它的猎物。

The doughty old man battled his illness with fierce determination.

大夫们多年来一直在和气这种疾病做斗争。

He has a quiet confidence about him and a fierce determination that is captivating.

他对自己相当自信，有一种迷人的坚定决心。