Gently cleaning between teeth and even below the gumline.

轻柔的清洗牙齿、甚至牙龈的下部。

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Many of my teeth have become very sensitive at the gumline.

我的许多牙齿的牙龈边缘变得十分敏感。

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And dental floss can go where no brush has gone before: between teeth, along the gumline.

而牙线可以进到牙刷不能到达的地方：牙间隙，牙龈边沿。

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