Good blood, bad blood is both blood.

好的血、坏的血都是血。

youdao

There is, it seems, some bad blood between Mills and the Baldwins.

米尔和鲍德温两家看上去好像有积怨。

《柯林斯英汉双解大词典》

All they wanted was to make bad blood between them and fish in troubled waters.

他们所要做的就是挑拨离间，混水摸鱼。

youdao

Because they are coming forward to give you blood, but at the end of it they may end up with bad news that they were not prepared for."

VOA: standard.2010.06.04

"because the fat mass can induce changes that are metabolically bad, like an increase in glucose or insulin, also an increase in fat,blood fats, like triglycerides or cholesterol."

VOA: standard.2010.07.08

More storage sites, more transport, and almost certainly more demonstrations as well as bad blood with Britain and France.

ECONOMIST: German nuclear power

And the growth of a club-within-a-club if the outs do stay out is sure to stir bad blood between the ins and the outs.

ECONOMIST: Pedro Solbes, commissioner for the euro

That implies an end to the doctrinal tensions that have existed between old-guard Socialists such as Henri Emmanuelli and the modernisers led by Dominique Strauss-Kahn and Laurent Fabius and also an end to the personal bad blood that has often set Messrs Strauss-Kahn and Fabius at odds.

ECONOMIST: France's new right