The practice of paying children an allowance became popular in America about 100 years ago.

大约100年前，给孩子们零花钱的做法在美国开始流行。

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Phineas Gage was a construction worker about 100 years ago.

大约一百年前，菲尼亚斯·盖奇是一名建筑工人。

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While vichyssoise can be dated to about 100 years ago, gazpacho has a much longer history and one that's a little harder to date.

奶油土豆浓汤可以追溯到大约100年前，西班牙凉菜汤的历史则久远得多，具体日期较难确定。

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Phineas Gage was a construction worker about 100 years ago.

大约一百年前,菲尼亚斯·盖奇是一名建筑工人

耶鲁公开课 - 心理学导论课程节选

So, let's see how some of this works, and hopefully your counterparts from 100 years ago would also be able to think about how this works, even if they don't have the quantum mechanics behind the individual electron configurations for atoms.

那么，下面让我们来看一下它是怎么用的，希望一百年前想你们一样的同学,也能够弄懂它为什么能用，尽管他们没有量子力学,不知道原子的电子排布。

麻省理工公开课 - 化学原理课程节选

We have about 100 years ago, a census of Cherokee-Indian state in Oklahoma.

NPR: Cherokee Nation Faces New Battle

The Northwest Passage, a shortcut to Asia, proved elusive until about 100 years ago, when Norway's Roald Amundsen completed a three-year journey.

NPR: Warming Eases Northwest Passage, Author Says

About 100 million years ago, sea levels were about 300 metres higher than at present because of changes in the volume of ocean basins due to movement by the Earth's techtonic plates.

BBC: Looking for the greenhouse signal