So they were kind of backfilling the details.

所以他们有点回填细节。

It started backfilling with pure oxygen.

用纯氧进行补压。

There, once again, are exceptions in these transition metals right here that for the most part are going in backfilling that D block.

再一次，这里的这些过渡金属有例外，它们大部分都用于回填 D 块。