She couldn't keep back her tears at the news.
听到那消息，她忍不住掉下了眼泪。
At the moment she just couldn't keep back her tears.
这时她就是没法忍住自己的眼泪。
In vain I tried to keep back my tears.
我怎么也忍不住我的眼泪。
I fought to keep back my tears.
我努力控制住泪水。
Hydraulic servo tuned magnetron I fought to keep back my tears.
水力伺服调谐磁控管我努力控制住泪水。