burn your fingers

• vi. 由于管闲事而吃苦头(前车之鉴；后事之师)

burn your fingers的用法和样例：

例句

1. If you invest in that company, you'll burn your fingers; its future is very uncertain.
   如果你投资那家公司，你会亏本的，那家公司前途难卜。
2. If you get involved in the controversy, you may burn your fingers.
   要是你卷入这场争吵的话，你会吃苦头的。