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1·Low iron levels in the blood can cause severe fatigue.

血液中铁含量低会导致严重的疲劳。

2·During sleep the automatic metabolic system is less responsive to carbon dioxide levels and oxygen levels in the blood.

在睡眠期间，自动的新陈代谢系统对血液中二氧化碳和氧气的含量反应并不灵敏。

3·The virus is still active in the blood.

这种病毒仍然在血液中起作用。《牛津词典》

4·Driving with excess alcohol in the blood is a serious offence.

血液里酒精含量过高时驾车是严重的违法行为。《牛津词典》

5·The drug increases the number of red cells in the blood, enhancing oxygen uptake by 10 percent.

这种药增加血液里的红细胞数量，将氧气吸收量提高百分之十。《柯林斯英汉双解大词典》

6·In the Blood Purge of 1934, a Nazi SS squad murdered Kurt von Schleicher in the doorway of his home.

在1934年的血液清洗中，一个纳粹党卫军小队在库尔特·冯·施莱歇家的门口谋杀了他。

7·Second, once sleep is fully obtained, there is an increase of carbon dioxide and a decrease of oxygen in the blood that persists during NREM.

第二，一旦完全进入睡眠状态，非快速眼动期间血液中的二氧化碳增加，氧气减少。

8·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。

9·Poikilocytosis refers to the presence of poikilocytes in the blood.

异形红细胞症是指血液中出现变异体细胞。

10·In diabetes, there is too much sugar in the blood.

糖尿病是血液里有太多糖。