streak of blood meaning in Chinese

血丝

When babies have diarrhea or streaks of blood in the stool , or have vomiting , fever , fatigue or poor appetite , take them to the doctor , preferably with their soiled nappies for inspection
宝宝腹泻、大便带黏液或血丝，或有持续呕吐、发烧、胃口或精神欠佳等，就要立即看医生。最好把有大便的尿片一并带去给医生检查。
He dressed entirely in black , with the exception of his white tie , and his funeral appearance was only mitigated by the slight line of red ribbon which passed almost imperceptibly through his button - hole , and appeared like a streak of blood traced with a delicate brush
他着一身黑衣服，只有领带是白的。这身打扮唯一不同于丧服的地方，就是穿在纽孔上的那条几乎难以觉察的红丝带，象是用红铅笔划出来的一缕血丝。