mass noun
1
- the red liquid that circulates in the arteries and veins of humans and other vertebrate animals, carrying oxygen to and carbon dioxide from the tissues of the body血, 血液：
drops of blood.
血滴。
1.1
- an internal bodily fluid, not necessarily red, which performs a similar function in invertebrates（无脊椎动物体内相当于血液的）体液, 生命液。
1.2
bloods
blood samples or tests血样; 血检：his bloods were normal.
他血检正常。
Blood consists of a mildly alkaline aqueous fluid (plasma) containing red cells (erythrocytes), white cells (leucocytes), and platelets; it is red when oxygenated and purple when deoxygenated. Red blood cells carry the protein haemoglobin, which gives blood its colour and can combine with oxygen, thus enabling the blood to carry oxygen from the lungs to the tissues. White blood cells protect the body against the invasion of foreign agents （e.g. bacteria）. Platelets and other factors present in plasma are concerned in the clotting of blood, preventing haemorrhage. In medieval science and medicine, blood was regarded as one of the four bodily humours, believed to be associated with a confident and optimistic temperament.
2
- figurative violence involving bloodshed〈喻〉杀戮, 残杀, 流血：
a commando operation full of blood and danger.
充满血腥和危险的突击队行动。
2.1
- figurative a person's downfall or punishment, typically as retribution〈喻〉（常指作为一种报应的）垮台; 惩罚：
the press is baying for blood.
报界叫嚷着要求给予惩罚。
3
- figurative fiery or passionate temperament〈喻〉火暴的脾性; 狂热的气质：
a ritual that fires up his blood.
让他热血沸腾的仪式。
4
- with modifier family background; descent or lineage出身; 血统, 家世：
she must have Irish blood in her.
她身上肯定有爱尔兰血统。
4.1
- count noun [in combination] a person of specified descent有某种血统的人：
a mixed-blood.
混血儿。
4.2
- count noun US informal a fellow black person〈美, 非正式〉黑人同胞。
5
- count noun dated, chiefly Brit. a fashionable and dashing young man〈旧, 主英〉纨绔子弟, 花花公子：
a group of young bloods.
一群年纪轻轻的纨绔子弟。
with obj.
1
- initiate (someone) in a particular activity使初次参加, 使初次取得经验：
clubs are too slow in blooding young players.
俱乐部在使用年轻选手方面动作太慢。
2
- Hunting smear the face of (a novice) with the blood of the kill【猎】用猎物的血涂（新手的）脸。
2.1
- give (a hound) a first taste of blood让（猎狗）第一次尝血。
短语
be like getting blood out of （或from） a stone （〈北美〉亦作turnip）
- be extremely difficult (said in reference to obtaining something from someone)就像从石头上榨出血来（比喻很难从某人身上获取某物）：
getting a story out of her is like getting blood out of a stone!
让她开口讲故事如登天一样难！
blood and guts
- informal violence and bloodshed, especially in fiction〈非正式〉（尤指小说里描写的）凶残, 血腥。
blood and thunder
- informal unrestrained and violent action or behaviour, especially in sport or fiction〈非正式〉（尤指体育或小说中）拼打动作, 暴力情节。
blood is thicker than water
- proverb family relationships and loyalties are the strongest and most important ones〈谚〉血浓于水。
one's blood is up
- one is in a fighting mood怒火中烧（指准备大打出手的心情）。
blood, sweat, and tears
- extremely hard work; unstinting effort做牛做马的活; 不懈的努力。
blood will tell
- proverb family characteristics cannot be concealed〈谚〉家族的特性总会显露。
first blood
1
- the first shedding of blood, especially in a boxing match or formerly in duelling with swords（尤指拳击比赛或决斗中的）最先见血。
2
- the first point or advantage gained in a contest（比赛中）先得分, 占先：
King drew first blood when he took the opening set.
在网球开盘局中金抢先得分。
give blood
- allow blood to be removed medically from one's body in order to be stored for use in transfusions献血。
have blood on one's hands
- be responsible for someone's death负有血债。
in one's blood
- ingrained in or fundamental to one's character天生就有的, 骨子里存在的：
racing is in his blood.
他天生长于赛跑。
make someone's blood boil
- informal infuriate someone〈非正式〉激怒, 使怒火中烧。
make someone's blood run cold
- horrify someone使不寒而栗。
new（或 fresh）blood
- new members admitted to a group, especially as an invigorating force新成员, 新人, 新鲜血液。
of the blood (royal)
- poetic/literary royal〈诗/文〉皇族的, 皇家的。
out for (someone's) blood
- set on getting revenge决意（对某人）复仇。
taste blood
- achieve an early success that stimulates further efforts因初次获胜而得到激励, 尝到甜头：
the speculators have tasted blood and could force a devaluation of the franc.
投机者已经尝到甜头, 可能会迫使法郎贬值。
young blood
- a younger member or members of a group, especially as an invigorating force年轻成员, 新生力量, 新鲜血液。
词源
Old English blōd, of Germanic origin; related to German Blut and Dutch bloed.