Nearly half of all pregnant women experience gum sensitivity and bleeding when brushing and flossing.

几乎一半的怀孕女性在她们刷牙和用牙线洁牙的时候，会经历牙龈过敏出血。

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Nearly half of all pregnant women experience gum sensitivity and bleeding when brushing and flossing.

几乎一半的怀孕女性在她们刷牙和用牙线洁牙的时候，会经历牙龈过敏出血。

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