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

The percentage of assessed value that was paid as property taxes to the city, however, did not change from year to year during this period.

但是，在此期间，作为城市缴纳的财产税的评估值的百分比逐年没有变化。

youdao

"American exports grew almost seventeen percent over the first four months of this year, compared to the same period last year.

VOA: special.2010.07.09

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

He notes this is an increase of 33 percent over the same period last year.

VOA: standard.2009.09.01

In fact, the authorised use of wiretapping for criminal investigations during the first half of this year decreased by 39% over the corresponding period of last year.

ECONOMIST: Letters

According to official figures, Hong Kong's economy contracted by 2.8% in the first quarter of this year compared with the same period last year.

ECONOMIST: One of the world��s most dynamic economies is in recession

World steel output was 8.5% higher in the first eight months of this year compared with the same period last year.

ECONOMIST: Brazil leads a dance to become very big in steel