do internal affairs

基本解释

Do not interfere with other countries internal affairs in order to avoid too many people being unhappy with America.
不要乾涉別國的內政，以免太多人不喜歡美國。
blog.sina.com.cn
We shall seize every opportunity to develop. We do not interfere in the internal affairs of other countries, nor do we fear their sanctions.
我們要利用機遇，把中國發展起來，少琯別人的事，也不怕制裁。
http://www.hotdic.com
Primakov also insisted that the agency have nothing to do with Russian internal affairs so that it wouldn't be tainted by any potential future suppression of domestic dissidents.
他還強調說這個機關不會插手俄羅斯的內部事務，因此組織會保持純潔性，未來不會出現任何打壓國內持不同意見者的可能。