Subject + 流血
流血 (liúxuè) is a verb-object compound meaning "to bleed" or "to shed blood." It combines 流 (to flow) and 血 (blood). It can describe both literal physical bleeding from an injury and figurative bloodshed in conflict or violence.
他摔倒了,膝盖流血了。
tā shuāidǎo le, xīgài liúxuè le.
He fell down and his knee was bleeding.
快拿纸巾来,她手指流血了。
kuài ná zhǐjīn lái, tā shǒuzhǐ liúxuè le.
Quick, bring some tissues—her finger is bleeding.
这场战争让无数人流血牺牲。
zhè chǎng zhànzhēng ràng wúshù rén liúxuè xīshēng.
This war caused countless people to shed blood and sacrifice their lives.