Recent research has also found that N-9 can cause irritation and small sores in some people, and therefore may actually facilitate HIV transmission.

最近的研究也表白n - 9可导致女性疼痛感，并使一部分人出现炎症，反而可能会助长了艾滋病的传播。

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Sores are usually small ulcers that develop in and around the mouth.

溃疡通常是发生在口腔内部各个部位的小溃口。

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Sores are usually small ulcers that develop in and around the mouth.

溃疡通常是发生在口腔内部各个部位的小溃口。

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