used to highlight the fact that one is describing something in an unusual or metaphorical way
[表明以不同寻常或比喻的方式陈述事实]容许我打个譬喻;可以说
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delving into the body's secrets, I looked death in the face, so to speak .钻研人体的秘密,打个比喻说,就是直面死亡。