turn green

As if by magic, his face turned green.

他的脸色一下子变青了。

The white mixture of starting materials turns green after milling, indicating the formation of polyaniline in its doped emeraldine oxidation state.

白色的初混合物在球磨后变成了绿色，这表明，混合物在杂苯胺绿氧化状态下形成了聚苯胺。