He is very cheerful

开朗───optimistic;他───he

Nevertheless, she is always optimistic about the possibilities and can work her charm on the disenchanted.───虽然如此，她总是乐观地抱持希望，并能深深地感染那些心灰意冷的人。

I know he is too optimistic but I don't want to depress him.───我知道他太过乐观了，但我不想令他灰心丧气。

I am not too optimistic about influencing a multibillion industry.───我并非对于影响一个数亿计的产业过于乐观.

She was never dejected by bad luck and stayed optimistic.───面对噩运,她从来不灰心和悲观.

Michael was in a jovial and optimistic mood.───迈克尔情绪愉快乐观。

I am cautiously optimistic that a new government will be concerned and aware about the environment.───对于新政府是否会关注环境问题，我持谨慎的乐观态度。

He has an optimistic view of life.───他乐观地看待人生。

She felt light-hearted and optimistic.───她感到无忧无虑，很乐观。

You will feel more buoyant and optimistic about the future than you have for a long time.