她只知道有人生病了，她听到了神秘而可怕的声音。
She only knew that people were ill and that she heard mysterious and frightening sounds.
警察只知道在有人威胁使用暴力或严重扰民时如何处理。
Policemen know just what to do if somebody threatens to use force, or seriously disturbs the neighbours.
相关人员中没有人被公布姓名，只知道两名渡假者来自于第四峡谷区域。
None of the people involved have been named but the two holidaymakers are known to be from the Forth Valley area.
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