speaking of the devil 说曹操，曹操到；一说曹操，曹操就到；大众演讲经验谈

【例句】
Speaking of the devil, here he comes.
说曹操，曹操到，他来了。

Speak of the devil─here's Alice now!
说曹操，曹操就到——瞧，爱丽斯这不来啦！