警方向他保证，在他处于保护性监禁期间，那些罪犯伤害不了他。

The police assured him that the criminals ___could ___not ___touch him while he was in protective custody.

他练就了如此厚的脸皮，严厉的批评再也伤害不了他了。

He developed such a thick skin that harsh criticism simply ___could ___not ___touch him anymore.

这些古代文物被保存在一个安全的金库里，湿气和光线都无法损害它们。

The ancient artefacts are kept in a secure vault where moisture and light ___cannot ___touch them.