One of the most popular and effective methods of tooth whitening is laser tooth whitening.

一种普便且行之有效的牙齿 增白技术是激光 增白。

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One of the most popular and effective methods of tooth whitening is laser tooth whitening. But for many people, this is too expensive to be an option.

一种普便且行之有效的牙齿增白技术是激光增白。但对于许多人而言，这种方法太过昂贵。

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Another reason the Waterlase and Biolase's other product, a tooth-whitening laser, appeal to customers is that they sound so high tech.

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