I'll put a stain (disclosing agent) on your teeth to show you where your toothbrush has missed.

我在你的牙齿上涂上着色剂，让你看一看有什莫地方牙刷没有刷到。

youdao

I'll put a stain (disclosing agent) on your teeth to show you where your toothbrush has missed.

我在你的牙齿上涂上着色剂，让你看一看有什莫地方牙刷没有刷到。

youdao