The soundtrack is not in sync with the picture.
声迹和画面
。
，
发生
态: synced, synched syncing, synching syncs, synchs 
;一刻;的;
;存在〔发生〕的;
放;复定位,新接入,复归,新给定;的；协调的The soundtrack is not in sync with the picture.
声迹和画面。
And keeping the satellite's huge beam and the distant rectenna reliably synced up also stands as an unsolved technical issue.
而要使卫星发射出来的巨大微波束与地面的网格形天线一直保持，也是一个尚未解决的技术难题。
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