Taking a measure of the diameter of the Moon in this photo and comparing to the diameter of the presumed Dark Twin, we find it is as large as 8 Moon diameters.
测量并比较一下照片上月球和假定的孪星的直径，我们发现后者直径是前者的8倍。
2
According to this measuring principle, photo-electric optical lever is used in pulling and stretching measuring instrument to develop a high-accuracy intelligent system to measure Youngs Modulus.
并根据此测量原理，将光电光杠杆应用于拉伸法杨氏模量测量仪中，设计了一种高精度杨氏模量智能测量系统。
3
The method of speckle photo is used to measure experimentally the displacement field of the viscoelastic model.