... 正常钢 normal steel 普通船尾 normal stern 正应力，垂直应力 normal stress ...
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"We're already using the fact that 5t4 is found in cancer cells, but not in normal tissue, to design immunotherapy against it and are testing two such systems in clinical trials, " said Professor Stern.
BBC: NEWS | Health | Molecule 'helps cancer to spread'
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