They demand blood for blood.

他们要求以血还血。

youdao

Blood for Blood, Haiti, June 2011.

以血还血海地，2011.6。

youdao

Don't use the blood for blood through lessons and lessons to be free.

别用鲜血换教训应借教训免血泪。

youdao

Doctor Thompson said sixteen of the mummies had enough heart or blood vessel tissues remaining for the doctors to examine.

VOA: special.2009.12.15

For example, sodium in our blood plasma is almost to the point sometimes of 100 millimol or that's very, very concentrated.

比如，钠在我们的血浆中的浓度,有时几乎达到了一百毫克分子,或者说非常非常浓。

麻省理工公开课 - 化学原理课程节选

The way, in the simplest terms that cyanide can kill you, is it basically out-competes your oxygen for the heme in your blood.

氰化物可以杀掉你的最简单的一种方式基本上就是，将氧从你血液中,的血红素中挤出去。

麻省理工公开课 - 化学原理课程节选

But the involvement of Americans, and the consequent American media and congressional interest, could make it a big one and, so, perhaps, the excuse for demanding blood for blood rather than pursuing the difficult search for negotiated peace.

ECONOMIST: Colombia

Now, the company will reward only those workers who meet healthy standards for blood pressure, glucose, cholesterol, triglycerides and waist size under 35 inches for women and 40 inches for men.

FORBES: Connecting marketers to the Forbes audience. What is this?

Yet although Mr Berlusconi may survive the scandals that have engulfed him, he can scarcely appeal to voters for blood, sweat and tears so long as he insists that Italy has emerged almost unscathed from the world's economic meltdown rather as the barracks in which the G8 summit is being held weathered the earthquake.

ECONOMIST: Italy and the G8 summit: A cavalier preparing to host the world | The