have a nose for的意思是：对…敏感，很善于发现。
nose
n.鼻子；嗅觉；芳香，香气；突出的部分
相关例句：
1）She has a nose for finding bargains.
她很善于搜寻便宜货。
2）He had a good nose for business.
他对做生意特别精明。
3）Police dogs have good noses for following criminals' trails.
警犬的嗅觉对罪犯留下来的痕迹特别敏锐。
4）A good reporter has a nose for news.
一个优秀的记者善于发现新闻。