美国科学家多年来一直在使用仪器寻找类地行星。
American scientists have been using instruments for years to look for earth-like planets.
一组仪器阵列将被安置在美国大平原，此处的强气旋比这个星球任何其他地方都更加频繁。
An array of instruments will be deployed across the US Great Plains, where violent twisters are more common than anywhere else on the planet.
最后，采用结合稀释/压力差仪器（美国弗吉尼亚时士满Borgwaldt-KC）的KC3进行香烟过滤器和压力差的测量。
Lastly, the measurements of the cigarette filter ventilation and pressure drop were taken using a KC3 combined dilution/pressure drop instrument (Borgwaldt-KC, Richmond, Virginia, USA).
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