Black-box operation, pinyin is àn xiāng cāo zuò. Most of them are illegal acts committed by taking advantage of their powers. This word comes from Taiwan Province Province. However, in Taiwan Province Province, it was originally called "black box homework" and "black box homework" (see Dictionary of Contemporary Hong Kong and Taiwan Terms by Shanghai Dictionary Publishing House).
Because the word "homework" has a meaning of "method" in Taiwan Province Province, but it doesn't have this meaning in Chinese mainland; Therefore, the mainland changed "black-box operation" and "sub-operation of ink cartridges" into "black-box operation", with the same meaning. Synonyms are black-box operation and fraud.
Black-box operation sentence making
1. When the project is in a highly transparent state, those traditional black-box operations will have nothing to hide. Who dares to eat Xiong Xinbao and reach out at will?
2. In order to put an end to the black-box operation, the contractor recently signed a lifelong quality responsibility letter with the water supply project headquarters.
3. A kind of folk game equipment, also called "western scenery", contains pictures in the box and a magnifying glass on the box. According to the optical principle, you can see the enlarged picture by black-box operation.
It is true that drawing lots can avoid black-box operation and back door.
5. EIA approval should be the first line of defense to strictly control pollution and the most critical iron gate. Under the black-box operation of these "red-top intermediaries", they have become cotton candy manipulated arbitrarily for personal gain.