开心

例句：

1. 1. I am very happy to see you here.
   我很高兴你在这里。
2. 2. She felt very happy after receiving the gift.
   收到礼物后，她感到非常快乐。
3. 3. The children were all happy and excited about the new toys.
   孩子们对新玩具都感到非常高兴和兴奋。