The country's blood banks are under the umbrella of the American Red Cross.
该国的血库均属于美国红十字会。
For tubular structures, such as blood vessels, the hydrogel is printed in the centre and around the outside of the ring of each cross-section before the cells are added.
在生产管状结构，例如血管时，每一层细胞涂布之间，水胶会被涂布到血管截面的内外来形成支撑。
Dr Renslo and his colleagues have therefore been analysing and modifying the chemical structure of aminothiazoles to see if this can enable them to cross the blood-brain barrier.
为此，Renslo博士与其同事已经在分析并尝试修饰氨噻唑的分子结构，以使之能通过血脑屏障。
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