He even left without saying goodbye.

他甚至没有说再见就离开了。

She left the house without saying goodbye.

她没有说再见就离开了家。

It was thoughtless of him to leave without saying goodbye.

他在没有说再见的情况下离开是缺乏考虑的。

He discreetly left the party without saying goodbye to avoid attention.

他谨慎地离开了派对，没有说再见以避免引起注意。

It would be rude to leave without saying goodbye.

不说再见就走是不礼貌的。

He left without saying goodbye.

他没说再见就离开了。

She went abroad without saying goodbye to her friends.

她没有像朋友道别就到了国外了。

He had no choice but to leave without saying goodbye.

他别无选择，只能不辞而别。

That he left without saying goodbye aroused my curiosity.

他不辞而别引起我的好奇心。

When people hang up on me without saying goodbye, I feel horrible for hours!

如果别人没有说再见就把电话挂了，我会好几个小时都感觉不好。