我下定决心要挖穿整个世界。

I made up my mind I would dig down through the world.

youdao

他下定决心要提高自己的英语。

He made up his mind to improve his English.

youdao

卡蒂下定决心要真正地抚养她。

Katie made up her mind to foster her for real.

youdao

Milton seemed to have decided against marriage as he was making the decision to wed himself to his poetry instead.

那里弥尔顿似乎已经决定不结婚了,因为他已经下定决心要致力于诗歌创作。

耶鲁公开课 - 弥尔顿课程节选

After a month I agreed with them, I told Bill I'm quitting, going back to Stanford.

一个月后我下定决心了，告诉比尔我要离开，会斯坦福继续念书。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

Or if predestined to die late, Make up your mind to die in state.

或者如果注定要晚点离开世界，那么下定决心离开地庄严一点。

耶鲁公开课 - 现代诗歌课程节选