科学家显示腔隙的沙门氏菌食物细菌如何在他们的无重量环境方面变得更有毒。
Scientists show how Salmonella food bacteria in space become more virulent in their weightless surroundings.
骨髓是一种红色、海绵状的东东，居住在很多大骨头的腔隙（骨髓腔）里；它需要铁元素、维生素B 12 、叶酸等原料来制造血红蛋白和红细胞。
To produce hemoglobin and red blood cells, your body needs iron, vitamin B-12, folate and other nutrients from the foods you eat.
缓进型高血压小动脉硬化导致小范围的腔隙性梗死灶，脑桥上可见一此种病变。
The arteriolar sclerosis that results from chronic hypertension leads to small lacunar infarcts or "lacunas" one of which is seen here in the pons.
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