Do you know the original source of this allusion?

　　你知道這個典故的出處嗎？

　　His statement was seen as an allusion to the recent drug-related killings.

　　他的聲明被視為暗指最近與毒品有關的`多起兇殺案。

　　The title is perhaps an allusion to AIDS.

　　該題目可能暗指艾滋病。

　　This idiom is an allusion to the analects.

　　這個成語的出典見《論語》。

　　His brows clouded at the allusion.

　　對于這一引喻，他雙眉緊鎖著。