唇颚裂是常见的一种先天性缺陷，亦是最可治愈的一种，大致可分为唇裂（或俗称兔唇，兔瓣嘴）、颚裂和唇颚裂。事实上，唇颚裂的产生是一个机率问题，因为胚胎发育的过程中，有很多方面是医学技术没有办法预防或侦测的。而一般对于唇颚裂形成的原因并不清楚，只知道部份是受到遗传或环境因素的影响。
我的心猛地沉了下去，因为我看见小狗有唇颚裂，无法合起嘴巴。
My heart sank inside my chest when I saw the little puppy had a 6 cleft lip and 7 palate and could not close its little mouth.
根据该组织的资料，世界各地的扶轮社，直接资助了超过200个的儿童经由微笑列车进行唇颚裂手术。
Rotary clubs worldwide have directly funded more than 200 cleft lip and palate surgeries for children through Smile Train, according to the organization.
进而会影响唇颚裂的婴儿在日后生活的讲话缺陷和心理问题，而且还会因为形成习惯而变得非常难以消除。
As a result, babies with untreated cleft lip and palate will not only develop speech defects and psychological problems later in life, but also form habits which become very hard to eliminate.
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