The weather alternates between sunshine and rain.

时天晴, 时下雨。

He's sort of poking the pigs and checking the flocks and herds.

他时猪 时安抚牛羊。

At times charged, at times languid.

时冲锋陷阵，时萎靡不振。

Constant volcanic and earthquake action occurs here, sometimes with cataclysmic results.

这地区频繁的火山活动及地震时造成惨重的后果。

Everything must be done in its own time.

每件事都必须应时做！

He hums to himself, he growls out tunes, he waves his arms.

他时哼哼呀呀自言自语，时大声咆哮高歌，奋力地挥舞着臂膀。

If something waxed and waned, it grew stronger then weaker over time.

“wax and wane”，形容某事随着时间的推移，时变强，时变弱。

I get up at ten o'clock now and then.

我时在十点起床。

But his assistants could be ruthless in their quest to further Marsh's scientific ambitions.

但他的助理为了满足马许在科学上的野心，时会使用无情的手段。

But in the meantime, we try to live in harmony with our sometimes turbulent planet.

但与此同时，我们试图与我们这个时动荡不安的星球和谐相处。

She could hear grief coming out of the ground, crying and screaming.

她听到了这片土地上传来的悲鸣，时呜咽、时尖叫。

By turns philosophical and polemical, this is a provocative and fascinating book.

时富有哲理，时充满争议，这是一深省且引入胜的书。

It was almost full of writing, mostly numbers, although sometimes there was a name.

笔记差不多写满了，大多是数字，时有个名。

Miss Hill fluidly switched between rapping and singing.

希尔小姐时饶舌，时唱歌。

More likely, there are branches that split off, developed, and came back together at times.

更有可能的是，有一些分支分化、展，时分裂，时又重新组合到一起。

For as the nimble flames towered, nodded, and swooped through the surrounding air.

因为那灵巧的火焰，在周围空气中时高升，时摇晃，时下落。

People can feel the wind is getting cool and see fogs in the morning sometimes.

们可以感觉到风渐冷，时早上会见到雾。

The buffaloes marched along with a tranquil gait, uttering now and then deafening bellowings.

们只好眼看着这些被美国错误地叫做" 水牛" 的反刍野兽不慌不忙地穿过铁路。它们一边走一边时出惊的吼声。

But on days he never left his screen, it was hard not to despair.

但在他从未离开过屏幕，时感到绝望也是情有可原。

Or " continuity" — objects don't just blink in and out of existence.

或“连续性”——物体不会时存在时不存在。