名词
中文翻译：过去的某个时刻同义词
同义词：
['once upon a time', 'past times', 'bygone days']
例句：
-
1. She was talking about the yestereven when she was in high school.
她谈到高中时，那时是很久以前了。
-
2. The old man often talks about his yestereven.
这位老人经常谈论他的过去。
-
3. It's hard to imagine the yestereven when we look at the present.
当我们看到现在的时候很难想象过去的某个时刻。