克里斯蒂娜仍不明白为什么他的心情一直这么糟。

Christina was still not clear why he had been in such ill humour.

《柯林斯英汉双解大词典》

塞缪尔不明白为什么每个人都这么惊讶。

Samuel can't understand why everyone is so surprised.

youdao

我不明白为什么你昨天下午没去听讲座。

I don't understand why you didn't go to the lecture yesterday afternoon.

youdao

.. I just don't--people don't like-- ... people would rather hate-- I don't know why it's something-- it wouldn't be a good movie theme, would it?

我不。。。人们不喜欢-,人们宁愿厌恶-,我不明白为什么-,那不是好的电影主题吗？

耶鲁公开课 - 金融市场课程节选

I don't understand why you'd want to take a pill to fix something that we know little about.

我不明白为什么你会愿意吃药片来治好一些我们甚至都不清楚的毛病。

对付压力的方法 - SpeakingMax英语口语达人

She didn't know why but she listened to him after all-- he was Gandhi.

她不明白为什么但还是听了他的话-,因为他是甘地。

哈佛公开课 - 幸福课课程节选