One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft-bodied and simply did not fossilize.

关于在这一亿年的重要时期中没有化石，有一种解释是，早期的动物是软体动物，根本不会变成化石。

youdao

One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft bodied and simply did not fossilize.

在这重要的一亿年的周期内缺乏化石（记录），关于这一点，有一种解释是早期的动物是软体动物，所以它们无法形成化石。

youdao

One of the most outstanding features at the beginning of this period was the prominence of Germanic generals in the high command of the Roman Imperial army.

这一时期初期最突出的特点之一是日耳曼将军在罗马帝国军队中的显著地位。

youdao

During this period, hair grows at a rate of about three tenths millimeters a day, or one centimeter a month.

VOA: special.2011.04.05

This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

Let's say this thing pays one pound a period forever.

假设公债规定永远于每时间段支付一英镑

耶鲁公开课 - 金融市场课程节选

In fact, the history of this period is one in which America's leaders have allowed the systematic dismantling of much of its capacity for waging the war of ideas via such broadcasts and woefully misapplied much of what remains.

CENTERFORSECURITYPOLICY: Soft power unplugged

During this 14-minute period one can conclude that hydrocarbons were flowing and pushing more fluid from the wellbore than was being pumped in.

WSJ: The Oil Disaster Is About Human, Not System, Failure

The holidays actually represent a down period for this one.

FORBES: Holiday Thieving Season