He had been engaged in emissary activity before he was discovered.
在被发现以前
一直从事间谍
。
He had been engaged in emissary activity before he was discovered.
在被发现以前
一直从事间谍
。
He was accused of spying and was declared non grata.
被指控从事间谍

被宣布为不受欢迎。
He used his job as a screen for his spying activities.
利用
的工作作掩

间谍
。
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