求翻译：预防性病交叉传染的通常方式是使用安全套，但安全套只能起到避免直接传染的问题，其他敏感部位相互接触仍可能导致性病传播感染。潘向东历时半年后，2007年他设计出更安全、方便、有效的“防性病三角裤”， 收到国家专利证书，授予其发明的“防性病三角裤”实用新型国家专利。是什么意思？

The prevention of sexually transmitted diseases cross infection in the usual way is to use a condom, but condoms can only play to avoid the problem of direct infection, and other sensitive parts of the contact with each other may still lead to sexually transmitted infections. Pan Xiangdong took six

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Prevention of sexually transmitted disease cross transmission of the usual way is to use a condom, but condoms only serve to avoid issues of direct transmission, other sensitive parts interaction may still result in sexually transmitted infections. Pan Xiangdong lasted half a year later, in 2007, he