退火过程中析出的二次碳化物阻碍再结晶晶界的迁移，从而影响再结晶层的界面推移速率。

The secondary carbides have a strong influence on recrystallization rate by retarding the migration of recrystallization grain boundaries.

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他们先把细菌封闭在凝胶内，这样，这些单细胞的细菌就会在没有水分的条件下清除盐结晶层，因为没有水分的参与，也就不会损坏壁画。

The scientists trap the bacteria in a gel.This way, the single-celled cleaning crew can destroy the salt layer with no moisture penetrating the murals.

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由于这幅壁画表面覆盖着一层结晶盐和明胶胶水，科学家就想到了去意大利研究一下那些以胶水为食的细菌。

The paint was covered by salt crystals and gelatin glue.So the researchers headed to Italy to learn about a glue-munching bacteria.

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