Top up has come to mean putting more credit into a mobile phone account or a public travel card.

比如给手机充值，或者给公共交通卡充值。 经常我们会去移动大厅或者买充值卡（top-up card）给手机充钱。

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The London Travel Card is a paper ticket that is valid on all London public transport.

伦敦旅游卡是一张纸质票，在伦敦所有公共交通工具上都有效。

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One solution is to build more accommodation on these public areas to cut down on travel time for work.

一个解决方案是在这些公共区域建造更多的住所，以减少工作通勤时间。

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Old-style banking required the public to travel across town, line up before tellers and fill out complicated forms.

CNN: The Asiaweek Financial 500

The poor also depend much more on those items of spending likely to be counted no longer affordable: creches, benefits, public health initiatives, subsidised travel on public transport and so on.

ECONOMIST: A voice of dissent

This is going to be scaring the public about their travel plans.

WHITEHOUSE: Press Briefing