碰巧我在办公室有一套备用钥匙。

As it happens, I have a spare set of keys in my office.

《牛津词典》

出现在感应城市实验室的这个项目由卡洛瑞缇操作，就是利用传感器和手持式的电子设备用新的方式描述城市。

The project emerged from the SENSEable City Laboratory, run by Carlo Ratti, which harnesses sensors and hand-held electronics to help describe cities in a new way.

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美国空军研究实验室的克里弗尔表示赞同：“他们可没有这么多的备用品，”他说。

The U.S. Air Force Research Laboratory's Cliver agrees: "They don't have a lot of these on the shelf, " he said.

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