When you start having financial obligations, rents, taxes, you have to keep track of how often you pay.

当你开始承担经济责任、租金、税收时，你必须记录你支付的频率。

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Let's start with North Point track.

让我们从北角铁路开始。

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Create an activity to track that goal by clicking Start an activity.

通过单击发起活动，创建一个活动来跟踪这个目标。

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"You don't realize how many calories you're taking in until you start keeping track, " said Hill.

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North Carolina received money to start improving existing track and an agreement was signed with rail freight company Norfolk Southern Railways to start exploring a major high-speed rail corridor between Charlotte and Raleigh.

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Drivers can also tell the app to add a track to their playlist, pause a track, play similar music or start an album, track or track radio.

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