Creating life cycles and classification systems.

创建生命周期和分类系统。

Very little is yet known of these worms’ life cycles.

在目前对这种蠕虫的生命周期还知之甚少。

How will the life cycles of the tundra be affected?

冻土带的生命循环将受到怎样的影响呢？

Ms Fleming worries that plants' life cycles are speeding up.

Fleming担心植物的生命周期正在加快之中。

High reliability, flexibility, low cost in whole life cycles.

高可靠性，灵活性，整个生命周期成本低。