Generally, tooth whitening is safe.

一般而言，牙齿美白很安全。

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Is tooth whitening safe?

美白牙齿安全吗？

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Is Tooth Whitening Safe?

给牙齿美白安全吗？

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The first home tooth whitening kit with light activated gel technology.

首款家庭用牙齿美白套件，配以光敏胶技术。

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Objective: to study the effect of tooth whitening strip on tooth bleach.

目的：研究洁白牙贴增白牙齿的效果。

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Objective: to study the effect of tooth whitening strip on tooth bleach.

目的：研究洁白牙贴增白牙齿的效果。

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