| 基金项目： | Supported by the National Natural Science Foundation of China.Acknowledgements I acknowledge very useful and helpful comments and suggestions from the anonymous referee. I thank Prof. Cheng HUANG of Shanghai Astronomical Observatory for his helpful discussions and advice, and I appreciate the support from the group of the Almanac and Astronomical Reference Systems in the Purple Mountain Observatory of China. This work is funded by the National Natural Science Foundation of China （Grant Nos. 11103085 and 11178006）. This project/publication was made possible through the support of a grant from the John Templeton Foundation. The opinions expressed in this publication are those of the authors and do not nec- essarily reflect the views of the John Templeton Foundation. The funds from the John Templeton Foundation were awarded in a grant to The University of Chicago, which also managed the program in conjunction with the National Astronomical Observatories, Chinese Academy of Sciences. |
