高兴

例句：

1. 1. I am happy to hear that you are doing well.
   听到你过得好，我很高兴。
2. 2. The children were happy playing in the park.
   孩子们在公园里玩耍时很开心。
3. 3. She is always happy when she sees her friends.
   她看到朋友时总是很开心。