It works only in the veins, where the blood flow is slower.
它只在血液流动较缓的静脉中起作用。
Only after several inadequate breaths under such conditions, resulting in the considerable elevation of carbon dioxide and reduction of oxygen in the blood, is breathing effort adjusted.
在这种情况下，只有在几次呼吸不足出现，导致血液中二氧化碳大量增加和氧气减少后，呼吸的力度才得到调整。
Of those people with high blood pressure, 69% are receiving treatment, yet, only 45% have their blood pressure controlled.
在那些高血压的人当中，69%正在接受治疗，然而，只有 45%的血压得到控制。
The lactic acid is released into the seal's blood only after the seal surfaces, when the lungs, liver, and other organs quickly clear the acid from the seal's bloodstream.
只有在海豹浮出水面后，即当肺部、肝脏和其他器官迅速将乳酸从海豹血液中清除时，乳酸才会被释放到海豹的血液中。
Donating blood is not only one of the easiest ways to save lives.
献血不仅仅是拯救生命最简单的方法之一。
Of those with high blood pressure, 69% are receiving treatment, yet, only 45% have their blood pressure controlled.
在那些高血压的人当中，69%正在接受治疗，然而，只有 45%的血压得到控制。
But it was not clear what test was used; only blood tests for antibodies would show whether pigs had the virus in February, when the human outbreak is thought to have begun.
但是还不太清楚的是什么检测被使用了；二月的时候，仅有关于抗体的血检验会显示猪是否携带病毒，当人类流感被认为在已经爆发时。
Only ink actually gets spilt: there will not be blood.
实际上只有墨水会溅出来：不再血溅。
Six live animals were born, but the scientists found that only one had blood proteins from both sheep and goats.
结果产下六只活生物，但科学家们发现，只有一只同时拥有绵羊和山羊的血蛋白。
Blood tests and ovary scans only give women a few years' advance notice.
血液检测和卵巢扫描只能为女性提供提前几年的通告。
After much research, Bella eventually discovers that Edward is a vampire, though he only consumes animal blood.
在进行了一番调查之后，贝拉发现爱德华原来是吸血鬼，虽然他只吸食动物的血。
Normally, your blood only forms clots if you injure yourself, to stop the bleeding.
一般的，只有当你受伤的时候，你的血液才会形成凝结用以止血。
So we will have a test that only requires a blood sample from both my son and me.
日后我们将去做一个测试，只需要儿子和我的血液样本。
Low glycemic index foods are better for you because they produce only small fluctuations in blood glucose and insulin levels compared with high glycemic index foods like rice and potatoes.
低血糖指数食物对人有益，相对于一些如大米和土豆等高血糖指数食物，小麦片仅仅使人体血液中的葡萄糖和胰岛素水平有细微的波动。
This includes good antenatal care, prevention and timely treatment of anaemia, assessment of the need for transfusion and safe blood transfusion given only when really required.
这包括良好的产前保健、预防和及时治疗贫血，评估输血的必要性以及只在实际需要时进行安全输血。
Blood type o can receive only o blood but are "universal donors" because o is acceptable to all other blood types.
O型血的人只能接受O型血，但O型血的人却是万能供血者，因为O型血可以被所有血型的人接受。
Blood pressure is only one of a number of factors that increase your risk of heart attack, stroke, and death.
而高血压只是引发心脏病，中风，甚至死亡的因素之一。
Years of cholesterol feeding studies show that dietary cholesterol has only a minimal effect, if any, on blood cholesterol levels.
多年的胆固醇喂食实验表明膳食中的胆固醇对血液中的胆固醇水平只有一点点影响。
What's more, these cells are involved in an intricate hormonal loop that in turn regulates not only insulin production, but also blood sugar levels and energy metabolism.
此外，反过来，这两种细胞在复杂的激素循环中，不仅能调节胰岛素的产生，而且还控制着血糖含量以及能量的新陈代谢。
This seems especially crazy considering the human body only contains about 10 pints of blood.
这看起来相当的不可思议，人类身体总共只有约10品脱的血液。
Sufficient supplies of safe blood can only be assured by regular donations from voluntary unpaid donors.
要保证有足够的安全血液供应，只能通过自愿无偿献血者的定期献血。
Unlike falciparum, vivax infects only the youngest red blood cells, those freshly emerged from bone marrow.
与疟原虫不同，间日疟原虫只感染刚刚从骨髓中分化出来的年幼血红细胞。
The only unconditional aspect is their thirst for blood.
唯一无条件的是他们对鲜血的渴望。
Over the years, the fear has been dispelled with sharks only attracted with blood.
多年过去了，这种恐惧慢慢消退，而且鲨鱼只对鲜血感兴趣而已。
It was only after the discovery of blood groups and anticoagulants in the 20th century that it became a common medical procedure.
只有到了20世纪血型和抗凝血剂被发现后，输血才成为一种普通的医学程序。
The HIV virus not only infects through blood, but also through tissues and cells, the chances of infection are 100 percent.
HIV病毒不仅通过血液传播，而且还通过组织、细胞传播，感染的可能性是100%。
Malaria isn't transmitted by male mosquitoes; only pregnant females bite people for their blood.
疟疾不是由雄性蚊子传播的，只有怀卵的雌性蚊子才会吸食人的血液。
Blood rubies: Burma exports only a handful of products, such as natural gas, wood, and gems.
血红宝石：缅甸出口的产品屈指可数，只有天然气，木材和宝石。
Blood rubies: Burma exports only a handful of products, such as natural gas, wood, and gems.
血红宝石：缅甸出口的产品屈指可数，只有天然气，木材和宝石。
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