As well as being quite ecialist in meaning, some of the words in idioms were used two or three hundred years ago, or longer, and can be a little o cure.

其不仅在意思上是十分特殊的，而且成语中的有些词是二、三百年前，甚至是在更久远年代使用的词汇，因此可能有点晦涩难懂。

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At two or three o 'clock, outside as dark.

凌晨两三点钟，外面漆黑如故。

youdao

The committee met to dicuss the organization of this year's carnival but they spent most of the time debating the side issue of whether to start it at two o 'clock or three o 'clock.

委员会开会讨论今年狂欢节的组织问题，但是他们却花了大部分时间去争论两点还是三点钟开始的枝节问题。

youdao

But about two or three o'clock of Monday, the following Monday, the city manager, the fire chief and I went out for a visual tour of the area.

NPR: Two Years Later, Joplin Mayor Reflects On Impact Of Tornado

Yet Mr O'Neill was also one of the two or three most influential figures in domestic politics, so he can hardly be brushed aside.

ECONOMIST: Lexington