Known as "the kissing disease" since it is passed by close contact, this chronic condition is debilitating and may disrupt study.

这个病以“亲吻之病”闻名，因为它是通过亲密接触而传染的。这个慢性病会使人非常虚弱，可能会影响学习。

There are lots of ways you can get gum disease, but you may not have known you can get it from kissing your dog too.

感染牙龈疾病的方式很多，但你也许不知道亲吻自家的狗狗也会感染吧。