Patricia Hewitt knows a thing or two about how to be well-organised.帕特里夏·休伊特很了解如何做到有条不紊。They know a thing or two about living graciously.他们很了解什么是高雅的生活。I know a thing or two about cars..我对车略有了解。You may not want to believe me, but I do know a thing or two.你也许不相信我，但我确实是很了解的。