John Kitching and colleagues at the National Institute of Standards and Technology (NIST) in Boulder, Colo., are designing atomic clocks that range in size from a sugar cube to a grain of rice.

在科罗拉多州博尔德的国家标准与技术学会(NIST)工作的John Kitching及其同事正在设计一系列微型电子钟，尺寸从一块方糖到一粒米大小。

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Paula Kitching, of the Historical Association, said the new course would be a positive step, but it should be geared to all ability levels and supported by more in-service training for teachers.

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