快乐 kuài lè happy; joyful Example sentences 旅游是一件很快乐的事情。 lǚyóu shì yī jiàn hěn kuàilè de shìqing. Traveling is a very happy thing 生日快乐!这是给你的礼物。 shēngrì kuàilè! zhè shì gěi nǐ de lǐwù. Happy Birthday! This present is for you