一段时间；时段

period costume───古装

period of rotation───旋转周期；自转周期

ahead of time───提前；提早

decision time───决定时间；抉择时刻

in/out of time───时不我待

out of time───不合时宜

period costumes───时期服装

periodontia───牙周病学；牙槽骨膜

periodontic───adj.牙周的；牙周膜的

long periods of time for work.───长时间段进行工作。

Must be able to run reliably for long periods of time.───必须能够可靠地运行很长一段时间。

Well, you're alive for equal periods of time.───但是你们活得时间一样长。

If you happen to set the metronome at this intermediate speed, you might struggle at it for long periods of time and build up a speed wall.───如果你刚好把节拍器设置在中速，你的速度提升可能会因此而长期无法有明显的进步。

Even very short periods of time add up to all useful hours I need, if I plunge in without delay.───如果我能立即投入工作，哪怕只有很短的时间，累积起来也会变成十分有用的几个小时。

You know how people seem to experience these life changing shifts when they travel abroad for extended periods of time?───你貌似知道人们长时间在国外旅行时，怎样经历这些生活变化的转变。

Like modern whales, Basilosaurus was an air breather and could not have stayed underwater for long periods of time.───和今天的鲸鱼一样，龙王鲸需要换气，不能长时间待在水下。

Anti-pattern: Source files stay checked out of a repository for long periods of time due to the amount of changes required for tasking.───反模式：由于所需的修改太多，源代码长时间签出存储库。

Do not put both hands in your pockets for long periods of time. This tends to make you look unprofessional.───别把两只手一直插在口袋里，这会让你看起来很不专业。

Some teachers expect incoming kindergarten children to be able to sit for long periods of time concentrating on workbooks or worksheets.

When the ground is frozen, walking on it for extended periods of time can cause frostbite.

The intention is that over extended periods of time equivalent machines receive an equivalent amount of resource.

His occupation condemned him to spend long periods of time away from his family.

Studying the body clock for extended periods of time Consider the following experimental design for a volunteer studied on his own.

It may be advisable to consult with others regarding realistic periods of time for the completion of certain tasks.

If your data loads run for long periods of time, then consider forbidding only merges during peak load times.

To him I owe the discovery that even very short periods of time add up to all useful hours I need, if I plunge in without delay.

Nature grants long periods of time for the work of natural selection.