When the bus stops somewhere, we tend to form AD hoc groups depending on what we feel like doing. This helps the passengers to mix more, as it could be too easy for people to divide along age lines.

每次巴士在一个地方停下来，我们都会根据自己的感觉组成一个特别的团体，这使乘客们更加打成一片，人们不会根据年龄区分开来。

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The problem cuts across all socioeconomic lines and affects all age groups.

这个问题超越社会经济的所有界限，影响各个年龄段的人。

《柯林斯英汉双解大词典》

The layered lines are reminiscent of fiber-optic cables, representing an inter-connected world in the information age.

桥梁线条形似光纤，寓意信息时代的互联互通。

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Still, this is an uneven recovery, with its starkest divisions along lines of age and training.

ECONOMIST: Employment figures

Now Allergan, maker of Botox, wants to spread fear of "brow furrow"--age-related vertical lines between the eyebrows--to middle America.

FORBES: Smooth Operator

The age of the underground lines is less important than whether they are getting adequately maintained, says Deborah Hersman, chair of the safety board, at the hearing.

FORBES: Pipeline Explosion Rattles Natural Gas Industry