A second printing head is used to deposit scaffolding—a sugar-based hydrogel. This does not interfere with the cells or stick to them.
在用来涂布细胞的喷头之外，另有一个喷头用来涂布支撑，这支撑是一种用糖做基底材料的水胶。
The book went to a second printing before it even hit the shelves.
这本书在上架之前已经进行了第二次印刷。
The book went to a second printing before it even hit the shelves.
这本书在上架之前已经进行了第二次印刷。
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