I have a stomach ache. I've had it for 3 hours now.

我肚子疼得很厉害，已经疼了3个多小时了。

youdao

They have a stomach ache, or diarrhea, or their grilled cheese sandwiches "tasted funny" or "didn't look right."

他们胃痛，或腹泻，或者说他们的烤芝士三明治味道很奇怪或看上起不对劲。

youdao

I have a terrible headache, I have a terrible stomach-ache, I have a terrible tooth-ache.

我头疼的厉害，我胃疼的厉害，我牙疼的厉害。

youdao

I have a stomach-ache.

我胃痛。

youdao

I have a stomach-ache.

我胃痛。

youdao