她对这个慈善项目投注了很多时间，却被告知由于人手不足，该项目不得不取消。(only to)

She has devoted much time to the charity project, only to be informed / told that it has to be cancelled due to the labour shortage / the shortage / lack of hands.

考查时态、动词短语、非谓语动词和宾语从句。主语 “她” 用人称代词she，谓语 “对……投注很多时间” 可用动词短语devote much time to ...，表示从过去持续到现在且可能还会持续下去的动词，用现在完成时态has devoted much time to，宾语 “这个慈善项目” 用名词词组the charity project；“却被告知” 表示出乎意料的结果，用不定式短语only to be informed / told表示；“由于人手不足，该项目不得不取消” 作宾语从句，用连词that引导该从句，从句中原因状语 “由于人手不足” 处理为介词短语due to the labour shortage / the shortage / lack of hands，句子主干 “该项目不得不取消” 译为it has to be cancelled。综上。故翻译为：“She has devoted much time to the charity project, only to be informed / told that it has to be cancelled due to the labour shortage / the shortage / lack of hands.”。