Based on the Back-to-Back Project for the Northwest and Central China Connection, This report studies the harmonics and ac filter at ac side in the HVDC converter station.

本论文以西北—华中联网背靠背直流换流站工程为基础，进行换流站交流侧谐波和交流滤波器的研究。

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Hope is the tie and connection back to Source, back to Love, back to the remembrance of the Oneness.

希望是回到源头、回到爱、回到统整性记忆的纽带和连接点。

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For many college students, back to school also means back to downloading music over the university's high-speed Internet connection.

对于许多大学生来说，回到学校就意味着可以重新通过学校的高速因特网下载音乐了。

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For many college students, back to school also means back to downloading music over the university's high-speed Internet connection.

对于许多大学生来说，回到学校就意味着可以重新通过学校的高速因特网下载音乐了。

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