1.很明显,他在尽力屏住呼吸．
It is obvious that he is trying his best to hold his breath.
我们屏息听她唱歌.
We held our breath when listening to her song
2.这些词意思上彼此相关.
These words are related to each other in meaning.
我能真正理解那首歌的内涵.
I can really relate to that song.
3.你这么乐观的理由是什么?
What makes you so optimistic?
我对他能存活下来相当乐观.
I'm fairly optimistic about his survival.
4.他对未来感到悲观.
He is pessimistic about the future.
我看你现在非常悲观.
I'd say you are very pessimistic.