Sometimes the craft is heavier than air, and sometimes lighter.

有飞行器比空气重, 有轻。

Others appeared brighter at times and less bright at others.

而其他行星看上去有亮些，有又不怎么亮。

Sometimes with strings and sometimes with the piano.

有用弦乐弹奏，有用钢琴。

It's something written down – sometimes not even written down.

有记录成文，有甚至都没被写下来。

Sometimes it helped, but sometimes it didn't.

有能见效，但有不能。

Sometimes politics, for example, but other things as well.

比如有是政治，有是其他事情。

Now and then I do. Now and then I don't.

有我收费，有我不收费。

There was no acting required on certain occasions.

所，有候，完全不用我去表演。

Sometimes, our strength comes from within us and sometimes it can't.

有我们的力量来自我们内心，有不能。

Sometimes it works, but sometimes it doesn't work.

有正常读取，有就没有反应。

At times, he is close to being a devil, at times to sainthood.

他有近乎魔鬼，有却似圣徒。

My neighbor's eccentric behavior is sometimes frightening.

我邻居的古怪行为有令恐惧。

Sometimes I'll walk outside, sometimes it's the bath.

有我会去外面散步，有会泡个澡。

Sometimes I think he does and sometimes I think he doesn't.

我觉得他有喜欢，有又不喜欢。

At other times he cleaned the shoes, the floors, and sometimes the plates.

有他清洗鞋子，地板，有是盘子。

Sometimes the fighting increases, they say, sometimes it slows down.

他们说，战斗有会加剧，有会放缓。

I suppose I can be a little bit careless sometimes.

我觉得我能有不大细心。

This isn't always as straightforward as it sounds.

这有并不如想象中的直接。

No, sometimes I get constipated and sometimes I have diarrhea.

不规律，有我便秘，有我腹泻。

Sometimes other strains of the virus spread more than expected.

因为有候意料之外的流感种类会流行开来。