一旦胃痛，你就吃这些药，每天两次。

Once you have a stomachache, take the medicine twice a day.

youdao

这些药每次服一片，每天两次。

Take one of these pills twice a day.

youdao

这些药每次服一片，每天两次。

Take one of these pills twice a day.

youdao