This kind of periodic orbit is only a phase in a comet's life.
这种周期性轨道只是彗星生命中的一个阶段。
If you didn't get a Periodic Table, swing by the office.
如果你们还没有周期表，可以到办公室来。
Why can't a woman write a rigorous periodic sentence?
为什么女人不写结构严谨的句子呢？
But still, he was able to put together a periodic table.
他依然能够将元素周期表制作出来。
Long long ago, we knew the periodic motion of a planet.
很久以前，我们就知道行星的周期运动。
Yeah, it is periodic, again, just like a woman.
是了，它有周期性，犹如一个女人一般。
Pure metals are elements which come from a particular area of the periodic table.
纯金属是在元素周期表中占据特定位置的元素。
Does the company have a periodic employee appraisal or performance review?
公司是否定期对员工进行鉴定和业绩评估？
Periodic geography is a borderline science between periodic science and geography.
周期地理学是一门介于周期学与地理学之间的边缘科学。
Everybody please take out a piece of paper and write the periodic table from memory.
请大家拿出一张纸，默写化学元素周期表。
But, this program can keep spoofing continuously with a periodic time.
但是，这一计划可以继续欺骗不断与定期的时间。
This is a very old idea that has received periodic re-formulations.
这是一个时常被周期性重新表述的古老观念。
We rushed to the football court, _________________ a sign on which "was written "Periodic Maintenance".
我们冲进足球场，结果只看见球场上一块牌子上写着“定期维修” 。
Most networks require that end use change their passwords on a periodic basis.
大多数网络要求结束使用定期更改密码。
Most networks require that end use change their passwords on a periodic basis.
大多数网络要求结束使用定期更改密码。
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