1 sentence for 对照 (duì​zhào — contrast)

1. 他们对对照组没有做任何特别的事情。

   tā​men duì duì​zhào​zǔ méi​yǒu zuò rèn​hé tè​bié de shì​qing.

   They didn’t do anything special with the control group.

   Source: CCMatrix