The healing agent, then, fills the crack through capillary action.

然后愈合剂通过毛细作用而充填裂纹。

youdao

But most of those have relied on tiny capsules that are filled with a healing agent.

但是大多都要依赖于填充了修复介体的荚囊。

youdao

After filling the crack, the healing agent reacts with the catalyst which is embedded in the matrix polymer.

充填裂纹后，愈合剂与包埋在基体聚合物中的催化剂反应。

youdao

The bacterial food incorporated into the healing agent is calcium lactate - a component of milk.

BBC: Key test for re-healable concrete

The group infused a plastic-like polymer with microscopic capsules containing a liquid healing agent.

BBC: Time to heal: The materials that repair themselves

The main challenge is to ensure the healing agent is robust enough to survive the mixing process.

BBC: Key test for re-healable concrete