The bleaching action of fluorides is slow in the alizarin dye procedure.

在茜素染料法中,氟化物的消色作用较慢.

辞典例句

But if you want teeth bleaching action in your toothpaste, you can have that, too.

但是,如果你想要使牙齿漂白, 你可以用美白牙膏.

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