39308:the cause of the sleeplessness has to be clearly identified.
想知道的语言点：
1—怎么翻译本句
1_the cause of the sleeplessness has to be clearly identified.
翻译：失眠的原因必须被清楚的诊断出来
或者：失眠的原因必须被清楚的查明
the cause of the sleeplessness ：失眠的原因
sleeplessness ：失眠
has to：必须
be clearly identified ：被清楚的诊断
identify：
vt.1.认出,识别2.支持,同情3.辨认；识别；认出；鉴定；验明；确定4.使等同于；把…看做一致(常与with连用)5.使支持；使参与，使关系密切(常与with连用)6.确认；认出；鉴定