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1·The aim is to reduce traffic at peak periods.

目的是缓解高峰期间的交通状况。《牛津词典》

2·March is one of the peak periods for our business.

三月是我们公司业务最繁忙的时期之一。《牛津词典》

3·She went through periods of compulsive overeating.

她发生强迫性暴食有过几个阶段。《牛津词典》

4·His painting went through both representational and abstract periods.

他的绘画风格经历了具象和抽象两个阶段。《柯林斯英汉双解大词典》

5·They had undoubtedly made progress in the six years that separated the two periods.

他们无疑在那两个时期之间的6年里取得了进步。《柯林斯英汉双解大词典》

6·In wet periods, the land may be able to respond to these stresses.

在湿润时期，土地可能会对这些压力作出反应。

7·The duration of previous geologic periods was difficult to determine.

以前很难确定地质期的持续时间。

8·Many people pass through periods of difficulty in sleeping and eating.

许多人都会经历睡眠和饮食困难的时期。

9·Fossils are thus identifying markers for particular periods in Earth's history.

因此，化石是识别地球历史上特定时期的标志。

10·Earth was already in one of its warm interglacial periods when we started burning fossil fuels.

当我们开始使用化石燃料时，地球已经处于温暖的间冰期之一。

周期

1·Katla seems to erupt on a semi-regular basis, with typical periods between eruptions of between 30 and 80 years.

卡特拉似乎是半规律地喷发的，典型的周期是每次爆发之间相隔30到80年。

2·That said, Katla does seem to erupt on a semi-regular basis, with typical periods between eruptions of between 30 and 80 years.

那就是说，卡特拉正是在一个半正规的基础上喷发的，典型的周期是每次爆发之间相隔30到80年。

3·His team interviewed historians and speech writers, studied periods of crisis, and listened to past inaugural orations.

他的团队访问了历史学家和演讲作家，研究危机周期，聆听历任的演说集。

4·It may be one of many aspects of the climate that flop around, seemingly at random, over periods of years to decades.

这可能是数年至数十年的周期以来气候骤然变向的诸多方面之一，而且看似毫无章法。

5·Typically, the number of active service class periods in a system should not exceed 30.

通常，系统中的活动服务分类周期的数量不应该超过30。

期数

1·We do not keep parcels for very long periods at our service, so we always advice customers to comply as soon as possible.

我们不保持小包因为很长的期数在我们的服务，因此我们总是通知书顾客尽快地遵守。

2·This period falls between the Baroque and the Romantic periods.

这时期在巴洛克风格和浪漫的期数之间落下。

3·It is conceivable that animals who are too stupid to be quite on their own initiative are, during periods of high risk, immobilized by the implacable arm of sleep.

资讯科技是想得到的动物谁是太愚蠢而无法主动地是相当是，在高的危险期数期间，被睡眠的难宽恕手臂使不动。

(1)period of time一段时间；时段

(1)long period长期的；长周期

(1)short periodadj. 短周期的；短过期的

(1)transition period过渡时期

(1)construction period施工期

(1)time period时期，期间