景气状况周期性地出现。
Proper selection will eliminate one source of likely breakdown in the communication cycle.
正确的选择将消除沟通周期中可能出现的故障。
These tiny things form the base of the food chain and play an important role in the global carbon cycle.
这些微小的东西构成了食物链的基础，并在全球碳循环中发挥着重要作用。
This comfortable cycle, in which the rhythms of the day helped shape the rhythms of the meals, gave rise to the custom of the large midday meal, eaten with the extended family.
在这种舒适的循环中，生活的节奏影响了一日三餐的节奏的形成，从而形成了与大家庭一起吃盛大午餐的习俗。
When nutrients are used over and over in the environment, we call that a nutrient cycle.
当营养物质在环境中被反复使用时，我们称之为营养循环。
The clock, called Sleep Smart, measures your sleep cycle, and waits for you to be in your lightest phase of sleep before rousing you.
这个被称为“智能睡眠”的闹钟会测量你的睡眠周期，等你进入最浅的睡眠阶段后再叫醒你。
Where are you in the cycle of renewal: Are you actively preserving the present, or selectively forgetting the past, or boldly creating the future?
你处于更新周期的哪个阶段：是积极维持现状，还是选择性忘记过去，又或是大胆创造未来？
Its numbers fall tenfold to thirty in a typical cycle, and a hundredfold change can occur.
在一个典型的循环中，其数量会以十倍到三十倍减少，甚至会出现一百倍的变化。
If the male frog could manage not to go through this freezing cycle, he'd probably have more success in mating.
如果雄蛙能够设法不经历这样的冻结周期就更可能交配成功。
He and others agree that the market cycle is at or near its top, particularly in America and Britain.
他和其他人一致认为，市场周期循环正处于或接近顶峰，尤其是在美国和英国。
The importance of the product life cycle to marketers is this: different stages in the product life cycle call for different strategies.
产品生命周期对营销人员的重要性在于：在产品生命周期的不同阶段需要采取不同的策略。
There is a regular cycle of change in resistance between the two sides of the nose.
鼻翼两边的阻力呈现一种有规律的周期性变化。
Typically, the preferred sleep cycle is delayed in adolescents, which leads to many students not feeling sleepy until much later in the evenings.
通常，青少年的睡眠周期会延迟，这导致许多学生直到晚上很晚才感到困倦。
The last step in the recycling section is similar to the last step in the production process with heating and pulping—before the cycle begins again.
回收部分的最后一步与加热和制浆的生产过程的最后一步相似——在循环再次开始之前。
Changes in the eccentricity of Earth's orbit occur in a cycle of about 96,000 years.
地球轨道偏心率的变化大约在96000年的一个周期内发生。
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