对 照

meaning for 对照 duìzhào:

- to contrast
- to compare
- to place side by side for comparison (as parallel texts)
- to check

duì对

yīzǔ一组

shǐyòng使用

xīnyào新药

，

duì对

lìng另

yīzǔ一组

zé则

shǐyòng使用

jiù旧

yào药

yǐzī以资

duìzhào对照

。

One group was treated with the new drug, and a second group was treated with the old one as a control.