当她认准一件事时,就会坚持做下去 英文翻译

以上几位的翻译都太中文化了，我觉得其实可以这样翻又不会改变句子的原意，又比较简单：

She won't turn back once she makes up her mind.

一旦她打定主意的话，就不会（轻易）改变。

When she is determined about something, she will stick to it until the end.

She will keep going with persistence once determination is made.

When she makes a decision, she will never give up.

She will keep going with persistence once determination is made.

威尼英语翻译网标准答案

当她认准一件事时,就会坚持做下去
When she makes a decision, she will never give up