嘴巴下垂的英语怎么说

嘴巴下垂的英语是 "drooping mouth"。这个短语源自英语动词 "droop", 其含义是 "弯曲、下垂、颓废"。

例句：

My mouth droops when I'm feeling sad. (当我感到悲伤时，我的嘴巴就会下垂。)
The old man's mouth drooped at the corners, giving him a sad expression. (老人的嘴角垂下来，使他看起来很悲伤。)
The flowers in the vase were drooping because they needed water. (花瓶里的花朵开始下垂，因为它们需要水。)

注意：在英语中，"mouth" 和 "face" 可以互换使用。所以，"drooping mouth" 可以改写成 "drooping face"。