She deliberated over the decision for a good few years before she finally made up her mind.

在她最终下定决心之前，她仔细考虑了这个决定多年。

She made up her mind to go and find it herself.

她决定自己去找。

She made up her mind instantly.

她立刻拿定主意了。

Gretel hasn't made up her mind yet.

格莱托还没拿定主意。

She has made up her mind to be a teacher.

已下定决心当一名教师。