He had been engaged in emissary activity before he was discovered.
在被发现以前他一直从事间谍活动。
；密使
家，外官;
使, 
, 
人;
;
;
杀，行刺;君;杀者;He had been engaged in emissary activity before he was discovered.
在被发现以前他一直从事间谍活动。
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