Did I make a contract with him in the forest, and sign it with my blood?

我刚才在树林里是不是和魔鬼订了契约，并且用我的血签了字？

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The classic sign of urogenital schistosomiasis is haematuria (blood in urine).

尿路血吸虫病的典型症状是血尿。

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Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or has blood in it, call your doctor.

抗生素药物可能导致腹泻，这说明你有可能又受到了新的感染。

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NORFOLK, Va. (AP) The Navy said Wednesday it will conduct random blood-alcohol tests on its sailors in the United States starting next month, a sign of how concerned the service's leaders have become about the effects alcohol abuse is having on the force.

NPR: Navy: Random Alcohol Tests For Sailors In US

There was no sign of the bull, although there was dung in the air and Donal saw it now blood on the street.

NEWYORKER: Bullfighting