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to tell or include all the facts about something
详细说明，仔细介绍
I won't go into detail over the phone, but I've been having a few health problems recently.
我在电话里就不细说了，但最近我的身体一直有些不舒服。
I will not go into detail in the article, since it is quite rare ( in my experience) that it is necessary to do this.
因为这种情况很少见(根据我的经验)，我就不在这详述了。