Scientists experimenting on a batch of them in Hanover notice that after a limb has been amputated a layer of skin cells forms from the cells at the spot of the incision.
科学家们在汉诺威医学院对蝾螈进行了大量的实验，他们发现当它的一只腿被截断后，刀口处皮肤上的一层细胞会先开始成形。
Inner layer is different for each batch.
每批包包的内层是不同的。
The five and three layer producing line of corruated paperboard paperboard works continuous, it is fit for big batch process and made high quality corrugated paperboard.
三层、层瓦楞纸板生产线是一种自动连续作业生产线，它适合大批量生产，制造优质的瓦楞纸板。
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